feat: add .architect/ project mapping system with architect-indexer agent and Docker containerization

- Add .architect/ directory structure (10 template files) as project brain for agent orientation
- Add architect-indexer agent that scans codebase and generates structured architecture docs
- Add Docker containerization: Dockerfile.architect-indexer, docker-compose.architect.yml
- Add TypeScript project-mapper module with staleness detection and context injection
- Add /index-project command, architect-first-contact rule, project-mapping skill
- Integrate orchestrator first-contact check: triggers indexing before any task delegation
- Add npm arch:* scripts for Docker-based indexing workflow
- Register agent in capability-index.yaml and AGENTS.md

.architect/state.json

@@ -0,0 +1,71 @@
+{
+  "version": 1,
+  "status": "not_indexed",
+  "last_full_index": null,
+  "last_incremental_update": null,
+  "last_file_count": 0,
+  "file_hashes": {},
+  "directory_hashes": {},
+  "dependency_hashes": {
+    "package_json": null,
+    "composer_json": null,
+    "go_mod": null,
+    "pubspec_yaml": null,
+    "cargo_toml": null,
+    "requirements_txt": null
+  },
+  "sections": {
+    "architecture_overview": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "dependency_graph": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "entities": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "db_schema": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "api_surface": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "conventions": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "tech_stack": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "file_graph": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    },
+    "module_graph": {
+      "last_updated": null,
+      "file_hash": null,
+      "status": "stale"
+    }
+  },
+  "staleness_threshold_hours": 24,
+  "indexing_agent": "architect-indexer",
+  "pipeline_integration": {
+    "check_on_first_contact": true,
+    "incremental_on_file_change": true,
+    "full_reindex_on_dependency_change": true
+  }
+}