feat: implement daemon model with registry and single-asset assignment (BAT-010, REQ-023/028)

Core Implementation (BAT-010):
- Add daemon registry schema and CRUD operations (req-023)
- Implement single-daemon asset assignment constraint (one asset per daemon)
- Add daemon_id field to service_token for daemon identification
- Add daemon.py CLI module for daemon management commands
- Add 20260513_0016_daemon_model.py migration for daemon tables

API Changes:
- GET /v1/assets: include daemon_id in AssetResponse
- POST /v1/assets/{asset_id}/ledger/trades: require daemon token binding
- GET /v1/user_info: include daemon metadata
- Enhanced service-token rotate to preserve daemon bindings

CLI Commands:
- pfhub daemon register --name <name> --runtime-id <runtime-id>
- pfhub daemon list
- pfhub daemon get <daemon-id>
- pfhub daemon revoke <daemon-id>

Requirements (REQ-023, REQ-028):
- REQ-023: Daemon Registry and Service Token Daemon Binding (Interface, Approved)
  * AC-1: daemon CRUD operations
  * AC-2: service token daemon binding for POST /v1/assets/{asset_id}/ledger/trades
  * AC-3: single daemon per asset (exact-one assignment model)
- REQ-028: README.md Daemon Provisioning Runbook update (Documentation, Approved)

Documentation:
- Add dcy-006 Discovery for daemon-id and single-daemon asset assignment
- Update README.md with Daemon Provisioning Runbook section
- Add BAT-010 batch documentation with planning, implementation, verification
- Update rel-006 release document (daemon model implementation)
- Update data-model.md with daemon and daemon_asset_assignment tables
- Update interface-contract.md with daemon registry APIs
- Update runtime-flows.md with daemon lifecycle flows

Breaking Changes:
- REQ-005~009, REQ-011~012 status reverted to Approved due to revised contract
  * daemon_id field addition and exact-one asset assignment requirement
  * Existing Implemented evidence invalidated by contract revision
  * BAT-001/002/008 re-verification required

Testing:
- Add test_daemon_registry.py for daemon CRUD operations
- Add test_daemon_assignment.py for single-asset assignment constraints
- Update test_auth.py, test_cli.py, test_v1.py for daemon support
- Verify daemon token binding in trade endpoint authorization

Impact:
- Database: 2 new tables (daemons, daemon_asset_assignments)
- Migration: 20260513_0016 creates daemon model schema
- CLI: 4 new daemon subcommands
- API: daemon_id propagation through v1 endpoints
- Verification: BAT-001/002/008 re-verification gates next release

docs/discovery/dcy-002_20260502_trex-basic-consumer-api-contract.md

@@ -5,9 +5,9 @@
 - 문서 ID: dcy-002_20260502_trex-basic-consumer-api-contract
 - 이슈명: trex-basic Consumer-Driven Contract 반영 — service-token runtime_id 발급 및 v1 API 엔드포인트 구현
 - 작성 시각(KST): 2026-05-02 00:00
-- 마지막 갱신 시각(KST): 2026-05-02 03:00
+- 마지막 갱신 시각(KST): 2026-05-13 17:08
 - 대체됨: 없음
-- 후속 Discovery 참조: 없음
+- 후속 Discovery 참조: docs/discovery/dcy-006_20260513_daemon-id-and-single-daemon-asset-assignment.md
 - 생성된 REQ 참조: REQ-004, REQ-005, REQ-006, REQ-007, REQ-008, REQ-009, REQ-010, REQ-011
 
 # 1. 계획 상태 요약