refactor(session): fold the session family into packages/session/

git mv the 12 packages from session-persistence/, session-projection/,
session-title/, and telemetry/ into one session/ group per the
regrouping RFC; merge the four group READMEs into one bilingual
triplet; rewrite the group segment in tsconfig references (intra-group
references shorten to ../<pkg>), tsconfig.base.json paths/globs,
knip.json keys, vitest include, gate scripts, and authored doc/note
citations; regenerate module graph, doc graphs, catalogs, and the
lockfile importer keys. No npm names change.

Full unit suite: 8779 passed; the 18 reported failures reproduce as
env flakes (ambient-proxy IPv6 tunneling, watched-dir inotify
timeouts under parallel load) — each passes in isolation with
NO_PROXY set, matching their known pre-existing behavior on master.

docs/core-data-structures/persistence.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/core-data-structures/persistence.md
-persistence.md: 3d2bc7ff3b45cd3f38fca0b880a0df9adb928bad
-persistence.zh.md: 035f46d76e0189bd686e991c3d56d486b6f309d5
+persistence.md: 177d596d3d01134266f139b47430e1e5064d04d6
+persistence.zh.md: 6582c0d7d02d1976d5c3ca3322284098130ed4ad

docs/core-data-structures/persistence.md

@@ -4,7 +4,7 @@ English | [中文](persistence.zh.md)
 
 The **durability seam** for the event log. [session.md](session.md) describes the in-memory `Session` — the append-only `SessionEvent` log that is the source of truth. This page describes how that log is made durable: the abstract `SessionPersistence` service, its backends, the flush checkpoint, crash recovery, and the metadata header that travels alongside the log. The event vocabulary the log carries is enumerated, member by member, in the generated [persistence log event catalog](../persistence-catalog.md).
 
-The seam is a textbook [capability seam](../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md): one abstract service ([dsh-session-persistence](../../packages/session-persistence/session-persistence), `ctx.sessionPersistence`) defining locate/create/append, reusable Session preparation, logical load/inspect, physical suffix reads, and lightweight list/snapshot observation over the existing `SessionEvent` — **no parallel persisted event type** — and two interchangeable backends implementing the same contract. See the [session-persistence Agent Note](../../.agents/notes/implemented/architecture/2026-06-14-session-persistence.md).
+The seam is a textbook [capability seam](../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md): one abstract service ([dsh-session-persistence](../../packages/session/session-persistence), `ctx.sessionPersistence`) defining locate/create/append, reusable Session preparation, logical load/inspect, physical suffix reads, and lightweight list/snapshot observation over the existing `SessionEvent` — **no parallel persisted event type** — and two interchangeable backends implementing the same contract. See the [session-persistence Agent Note](../../.agents/notes/implemented/architecture/2026-06-14-session-persistence.md).
 
 ## The flush checkpoint
 
@@ -202,5 +202,5 @@ interface SessionPersistenceSnapshot {
 
 Both implement the same abstract `SessionPersistence` (locate/create/append/prepare/load/inspect/readFrom/list/listSnapshots over `SessionEvent`, with optional cancellation on observation methods) and pass `runPersistenceContract`, proving the seam is genuinely backend-agnostic:
 
-- **[dsh-session-persistence-jsonl](../../packages/session-persistence/session-persistence-jsonl)** — an append-only logical JSONL log per session, stored as checksummed concatenated Zstandard frames by default or raw lines by configuration, with crash-safe atomic writes, interrupted-turn recovery, and a read/replay path.
-- **[dsh-session-persistence-sqlite](../../packages/session-persistence/session-persistence-sqlite)** — `node:sqlite`, one row per `SessionEvent`. The row shape `(session_id, seq, type, time, data, source_event_seqs, surface_op)` maps 1:1 onto the event, including optional surface metadata, so there is no parallel persisted schema to keep in sync.
+- **[dsh-session-persistence-jsonl](../../packages/session/session-persistence-jsonl)** — an append-only logical JSONL log per session, stored as checksummed concatenated Zstandard frames by default or raw lines by configuration, with crash-safe atomic writes, interrupted-turn recovery, and a read/replay path.
+- **[dsh-session-persistence-sqlite](../../packages/session/session-persistence-sqlite)** — `node:sqlite`, one row per `SessionEvent`. The row shape `(session_id, seq, type, time, data, source_event_seqs, surface_op)` maps 1:1 onto the event, including optional surface metadata, so there is no parallel persisted schema to keep in sync.

docs/core-data-structures/persistence.zh.md

@@ -4,7 +4,7 @@
 
 事件日志的**持久性 seam**。[session.md](session.md) 描述了内存中的 `Session`：仅追加的 `SessionEvent` 日志即为真源。本页描述如何使该日志持久化：抽象的 `SessionPersistence` 服务、它的后端、flush 检查点、崩溃恢复，以及随日志一同存储的元数据头。日志承载的事件词汇在生成的[持久化日志事件目录](../persistence-catalog.md)中逐项列举。
 
-该 seam 是典型的[能力 seam](../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md)：一个抽象服务（[dsh-session-persistence](../../packages/session-persistence/session-persistence)，`ctx.sessionPersistence`）在现有 `SessionEvent` 上定义 locate/create/append、可复用的 Session 准备流程、逻辑 load/inspect、物理后缀读取，以及轻量的 list/snapshot 观察——**没有平行的持久化事件类型**——以及两个实现同一契约的可互换后端。见 [session-persistence Agent Note](../../.agents/notes/implemented/architecture/2026-06-14-session-persistence.md)。
+该 seam 是典型的[能力 seam](../../.agents/notes/implemented/architecture/2026-06-13-capability-seams.md)：一个抽象服务（[dsh-session-persistence](../../packages/session/session-persistence)，`ctx.sessionPersistence`）在现有 `SessionEvent` 上定义 locate/create/append、可复用的 Session 准备流程、逻辑 load/inspect、物理后缀读取，以及轻量的 list/snapshot 观察——**没有平行的持久化事件类型**——以及两个实现同一契约的可互换后端。见 [session-persistence Agent Note](../../.agents/notes/implemented/architecture/2026-06-14-session-persistence.md)。
 
 ## flush 检查点
 
@@ -202,5 +202,5 @@ interface SessionPersistenceSnapshot {
 
 两者都实现同一个抽象 `SessionPersistence`（在 `SessionEvent` 上执行 locate/create/append/prepare/load/inspect/readFrom/list/listSnapshots，观察方法可选支持取消），并通过 `runPersistenceContract`，证明该 seam 确实与后端无关：
 
-- **[dsh-session-persistence-jsonl](../../packages/session-persistence/session-persistence-jsonl)**——每个会话一份仅追加的逻辑 JSONL 日志，默认存储为带 checksum 的连续 Zstandard frame，也可配置为原始行；支持崩溃安全的原子写入、被中断轮次的恢复以及读取/回放路径。
-- **[dsh-session-persistence-sqlite](../../packages/session-persistence/session-persistence-sqlite)**：基于 `node:sqlite`，每个 `SessionEvent` 一行。行结构 `(session_id, seq, type, time, data, source_event_seqs, surface_op)` 与事件 1:1 映射（包含可选的 surface 元数据），因此没有需要保持同步的并行持久化 schema。
+- **[dsh-session-persistence-jsonl](../../packages/session/session-persistence-jsonl)**——每个会话一份仅追加的逻辑 JSONL 日志，默认存储为带 checksum 的连续 Zstandard frame，也可配置为原始行；支持崩溃安全的原子写入、被中断轮次的恢复以及读取/回放路径。
+- **[dsh-session-persistence-sqlite](../../packages/session/session-persistence-sqlite)**：基于 `node:sqlite`，每个 `SessionEvent` 一行。行结构 `(session_id, seq, type, time, data, source_event_seqs, surface_op)` 与事件 1:1 映射（包含可选的 surface 元数据），因此没有需要保持同步的并行持久化 schema。

docs/core-data-structures/session-title.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write docs/core-data-structures/session-title.md
-session-title.md: fff1aa1f6be45d0cfc4d7f6a9527ccb93561618f
-session-title.zh.md: 77a0a5e94053c94bf84bbc749cb6e260898b5d00
+session-title.md: 7bced67f07df3f00471f02b766922cdc3e4fd29e
+session-title.zh.md: e8e501d3aafee49395da3d9a8efd4e91a724f09e

docs/core-data-structures/session-title.md

@@ -2,9 +2,9 @@
 
 English | [中文](session-title.zh.md)
 
-Durable latest-wins title state and the optional asynchronous provider vocabulary owned by [`@deepseek-ai/dsh-session-title`](../../packages/session-title/session-title). The shared LLM helper owns the exact auxiliary request record. Package READMEs own timing, fallback, failure, and fork behavior; the generated [persistence catalog](../persistence-catalog.md) owns the complete event declarations.
+Durable latest-wins title state and the optional asynchronous provider vocabulary owned by [`@deepseek-ai/dsh-session-title`](../../packages/session/session-title). The shared LLM helper owns the exact auxiliary request record. Package READMEs own timing, fallback, failure, and fork behavior; the generated [persistence catalog](../persistence-catalog.md) owns the complete event declarations.
 
-Sources: [`packages/session-title/session-title/src/index.ts`](../../packages/session-title/session-title/src/index.ts), [`packages/session-title/session-title-llm/src/index.ts`](../../packages/session-title/session-title-llm/src/index.ts)
+Sources: [`packages/session/session-title/src/index.ts`](../../packages/session/session-title/src/index.ts), [`packages/session/session-title-llm/src/index.ts`](../../packages/session/session-title-llm/src/index.ts)
 
 ## Durable title state
 

docs/core-data-structures/session-title.zh.md

@@ -2,9 +2,9 @@
 
 [English](session-title.md) | 中文
 
-[`@deepseek-ai/dsh-session-title`](../../packages/session-title/session-title) 所拥有的持久、后写覆盖的标题状态与可选异步提供方词汇。共享 LLM（大语言模型）辅助组件负责精确的辅助请求记录。各包 README 负责时序、回退、失败与 fork 行为；生成的[持久化日志事件目录](../persistence-catalog.md)负责完整的事件声明。
+[`@deepseek-ai/dsh-session-title`](../../packages/session/session-title) 所拥有的持久、后写覆盖的标题状态与可选异步提供方词汇。共享 LLM（大语言模型）辅助组件负责精确的辅助请求记录。各包 README 负责时序、回退、失败与 fork 行为；生成的[持久化日志事件目录](../persistence-catalog.md)负责完整的事件声明。
 
-源码：[`packages/session-title/session-title/src/index.ts`](../../packages/session-title/session-title/src/index.ts)、[`packages/session-title/session-title-llm/src/index.ts`](../../packages/session-title/session-title-llm/src/index.ts)
+源码：[`packages/session/session-title/src/index.ts`](../../packages/session/session-title/src/index.ts)、[`packages/session/session-title-llm/src/index.ts`](../../packages/session/session-title-llm/src/index.ts)
 
 ## 持久标题状态