feat(tasks): add needs_human intervention flag (CUST-WP-0009)

- Migration b4c5d6e7f8a9: adds needs_human (bool) + intervention_note (text) to tasks
- API: needs_human filter on GET /tasks/; 422 if flagged without note
- 3 MCP tools: flag_for_human, clear_human_flag, list_human_interventions
- Dashboard: interventions.md with amber cards and "Mark done" button
- Policy router + workstream DoD policy (workstream-dod.md)
- Workstream lifecycle docs page + workplan CUST-WP-0010
- CLAUDE.md: add step 4 (run fix-consistency after workplan writes)
- consistency_check.py: promote C-11 unlinked tasks from INFO to WARN

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -94,6 +94,12 @@ Every Claude Code session in this repository must follow this ritual:
 1. Call `add_progress_event()` to log what was done, decided, or discovered
 2. If new tasks were identified, create them with `create_task()`
 3. If decisions were made, record them with `record_decision()`
+4. If any workplan files were written or modified this session, run:
+   ```bash
+   cd state-hub && make fix-consistency REPO=the-custodian
+   ```
+   This syncs task blocks → DB and updates task statuses. Without this step, the
+   "Open Workstreams by Domain" chart will show 0 progress even for completed work.
 
 The state hub is the episodic memory of this system. A session that produces no progress events is invisible to future sessions and to Bernd.