- Add test_hooks_grpc_integration.py with in-process gRPC tests:
- Test Implemented RPC returns correct hook list
- Test lifecycle hooks (OnActivate, OnDeactivate, OnConfigurationChange)
- Test MessageWillBePosted allow/reject/modify scenarios
- Test notification hooks (MessageHasBeenPosted)
- Test activation failure propagation via response.error
- Test async handlers work through gRPC
- Fix lifecycle hooks to encode errors in response, not gRPC status
- Remove context parameter from runner.invoke() for lifecycle hooks
- Ensures activation failures are returned as AppError, not gRPC error
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
