feat(ms22-p2): add agent status endpoints and chat routing

P2-005: Agent status endpoints
- GET /api/agents/status — list all user's agents with status
- GET /api/agents/:id/status — single agent status

P2-006: Agent chat routing
- Add optional `agent` parameter to chat requests
- Validate agent exists and is active for user
- Pass agent personality/model config to OpenClaw

Task: MS22-P2-005, MS22-P2-006

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

docs/TASKS.md

@@ -100,7 +100,7 @@ PRD: `docs/PRD-MS22-P2-AGENT-FLEET.md`
 | MS22-P2-002 | done        | p2-fleet | Seed default agents (jarvis, builder, medic) | TASKS:P2 | api   | feat/ms22-p2-agent-seed     | P2-001        | P2-004        | orchestrator    | 2026-03-04 | 2026-03-04 | 5K         | 2K         | PR #677 merged |
 | MS22-P2-003 | done        | p2-fleet | Agent template CRUD endpoints (admin)        | TASKS:P2 | api   | feat/ms22-p2-agent-crud     | P2-001        | P2-005        | orchestrator    | 2026-03-04 | 2026-03-04 | 15K        | 5K         | PR #678 merged |
 | MS22-P2-004 | done        | p2-fleet | User agent CRUD endpoints                    | TASKS:P2 | api   | feat/ms22-p2-user-agents    | P2-002,P2-003 | P2-006        | orchestrator    | 2026-03-04 | 2026-03-04 | 15K        | 8K         | PR #682 merged |
-| MS22-P2-005 | not-started | p2-fleet | Agent status endpoints                       | TASKS:P2 | api   | feat/ms22-p2-agent-api      | P2-003        | P2-008        | —               | —          | —          | 10K        | —          |                |
+| MS22-P2-005 | in-progress | p2-fleet | Agent status endpoints                       | TASKS:P2 | api   | feat/ms22-p2-agent-status   | P2-003        | P2-008        | orchestrator    | 2026-03-04 | —          | 10K        | —          |                |
 | MS22-P2-006 | not-started | p2-fleet | Agent chat routing (select agent by name)    | TASKS:P2 | api   | feat/ms22-p2-agent-routing  | P2-004        | P2-007        | —               | —          | —          | 15K        | —          |                |
 | MS22-P2-007 | not-started | p2-fleet | Discord channel → agent routing              | TASKS:P2 | api   | feat/ms22-p2-discord-router | P2-006        | P2-009        | —               | —          | —          | 15K        | —          |                |
 | MS22-P2-008 | not-started | p2-fleet | Agent list/selector UI in WebUI              | TASKS:P2 | web   | feat/ms22-p2-agent-ui       | P2-005        | —             | —               | —          | —          | 15K        | —          |                |