feat(gateway): Phase 2 - Session Management & Browse Directory

[TelivANT]

Phase 2 Implementation

Features

• ✅ Session management for connectors
• ✅ Store connectors after test_connection
• ✅ Browse directory with actual file listing
• ✅ Thread-safe connector sharing (Arc<RwLock<>>)

Changes

1. WikiState: Added connector_sessions field
2. test_connection: Stores connector in session after successful connection
3. browse_directory: Retrieves connector from session and lists files

Supported Connectors

• Local filesystem
• Git repositories

API Flow

1. POST /v1/wiki/connectors/test -> returns connector_id
2. POST /v1/wiki/connectors/browse -> uses connector_id to browse

Next Steps (Phase 2.1)

• Session expiry (1 hour)
• Cleanup task
• S3 connector support

Testing

# Test local connector
curl -X POST http://localhost:3000/v1/wiki/connectors/test \
  -H "Content-Type: application/json" \
  -d '{"type":"local","config":{"path":"/tmp"}}'

# Browse directory
curl -X POST http://localhost:3000/v1/wiki/connectors/browse \
  -H "Content-Type: application/json" \
  -d '{"connector_id":"<id>","path":"/"}'

Closes #32 follow-up