- Add api_keys table (id, user_id, key_hash, label, created_at) to schema
- Add POST /auth/apikeys to generate 32-byte hex API keys (bcrypt-hashed)
- Add GET /auth/apikeys to list active key metadata (no secrets)
- Add DELETE /auth/apikeys/{key_id} to revoke keys
- Extend get_current_user to accept either JWT Bearer or X-API-Key header
- Plaintext key returned only at creation time
- 16 new tests covering creation, listing, revocation, auth, and full flow
Closesleeworks-agents/SPARC#1673
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>