feat(session-query): expose projectSessions batch projection

Public SessionQueryService.projectSessions wraps the existing corpus
projectMany: one persistence listing, bounded persisted-inspect
concurrency, per-id failure isolation, and a synchronous projector over
a borrowed source with no replay validation or cloning.
readTitleSnapshots now routes through it; LogicalSessionSource and
LogicalProjectionResult are exported and documented.

scripts/gen-cordis-catalog.ts

@@ -55,6 +55,8 @@ export const LINK_MAP: Readonly<Record<string, string>> = {
   SessionEvent: 'core.md',
   SessionId: 'core.md',
   SessionStartSource: 'core.md',
+  LogicalProjectionResult: 'session-query.md',
+  LogicalSessionSource: 'session-query.md',
   SessionLogSnapshot: 'session-query.md',
   SessionSurfaceSnapshot: 'session-query.md',
   ApprovalOutcome: 'approval.md',

scripts/type-equiv.manifest.json

@@ -449,6 +449,16 @@
       "symbol": "SessionTitleObservationResult",
       "source": "packages/session-query/session-query/src/types.ts"
     },
+    {
+      "doc": "docs/core-data-structures/session-query.md",
+      "symbol": "LogicalSessionSource",
+      "source": "packages/session-query/session-query/src/corpus.ts"
+    },
+    {
+      "doc": "docs/core-data-structures/session-query.md",
+      "symbol": "LogicalProjectionResult",
+      "source": "packages/session-query/session-query/src/corpus.ts"
+    },
     {
       "doc": "docs/core-data-structures/session-query.md",
       "symbol": "SessionEventRecord",