Security Fix:
- Update v1_ledger.py to require trade_write permission instead of read
- Fix authentication dependency from require_read to require_trade_write
- Ensure trade operations cannot be performed with read-only service tokens
Test Coverage:
- Add test_v1_ledger_trade_requires_trade_write_permission() to verify permission boundary
- Confirm read-only tokens are rejected with 403 Forbidden status
- Validate repository methods are not called on permission failure
Documentation:
- Add new Discovery dcy-005 for production admin bootstrap and operator access
- Update docs/discovery/index.md with dcy-005 entry
- Update release rel-001 with additional verification notes and issue references