feat(reconciliation): implement deterministic state reconciliation engine and post-commit hook

- Implement ReconciliationEngine in server/src/handlers/reconciliation.rs
- Auto-transition ADRs to implemented, resolve tech debts, and cascade task unblocking
- Ingest git commit events via POST /api/git/commit and scripts/git-reconcile.py post-commit hook
- Add universal pagination, search filtering, and keyboard navigation to dashboard
- Implement non-destructive task TTL expiry sweeper and gate verification
- Implements: ADR-0102, ADR-0103

agent-rules/global_subagents.md

@@ -12,7 +12,7 @@ Invoke these dynamically using the `invoke_subagent` tool. Use `send_message` to
 * **Role:** The Knowledge Graph Curator
 * **Permissions:** You MUST define this subagent with `enable_mcp_tools: true` and `enable_write_tools: true` so it can autonomously update the graph without hitting permission boundaries.
 * **Trigger:** After completing a coding task, refactor, or bug fix.
-* **Action:** Send a message detailing the work (with exact git hashes and branches). The Librarian will use MCP tools (`log_code_change`, `log_error_fix`, `create_entities`, etc.) in the background to organize the knowledge graph.
+* **Action:** Send a message detailing the work (with exact git hashes and branches). The Librarian will use MCP tools (`log_code_change`, `log_error_fix`, `create_entities`, etc.) in the background to organize the knowledge graph. **CRITICAL:** The Librarian MUST inspect recent git commits and commit messages for any referenced ADRs (e.g. `ADR-\d+`), and automatically reconcile their lifecycle status in `decisions` to `implemented` with the exact `git_commit` and `git_branch`. No ADR whose code has been committed should ever remain in `accepted` status.
 
 ## 2. PrePushAuditor
 * **Role:** Quality Gate Enforcer