Merge remote-tracking branch 'origin/master' into ji

# Conflicts:
#	offline-backend-20260512/backend/app/gateway/app.py

.gitignore

@@ -125,25 +125,28 @@ offline-backend-20260512/backend/tests/*
 # Independent enterprise-research persistence, HTTP and race regressions.
 !offline-backend-20260512/backend/tests/test_enterprise_research_tasks.py
 # Position-roundtable per-turn write/present cap (weak-model duplicate artifacts).
-!offline-backend-20260512/backend/tests/test_position_artifact_cap.py
-# Roundtable coordinator/seat capability isolation regressions.
-!offline-backend-20260512/backend/tests/test_roundtable_role_boundary.py
-# Workflow Studio: schemas / definitions / engine / run-lifecycle regressions
+!offline-backend-20260512/backend/tests/test_position_artifact_cap.py
+# Roundtable coordinator/seat capability isolation regressions.
+!offline-backend-20260512/backend/tests/test_roundtable_role_boundary.py
+# Workflow Studio: schemas / definitions / engine / run-lifecycle regressions
 # plus the concurrency remediation suite (atomic resume, draft CAS, publish
 # counter, event seq) — required in CI per docs/WORKFLOW_STUDIO_BACKEND_REMEDIATION_ZH.md P1-06.
 !offline-backend-20260512/backend/tests/test_workflow_schemas.py
 !offline-backend-20260512/backend/tests/test_workflow_definitions.py
-!offline-backend-20260512/backend/tests/test_workflow_engine.py
-!offline-backend-20260512/backend/tests/test_workflow_runs.py
-!offline-backend-20260512/backend/tests/test_workflow_concurrency.py
-!offline-backend-20260512/backend/tests/test_workflow_schema_rebuild.py
-# Writing-mode first-report pipeline enforcement regressions.
+!offline-backend-20260512/backend/tests/test_workflow_engine.py
+!offline-backend-20260512/backend/tests/test_workflow_runs.py
+!offline-backend-20260512/backend/tests/test_workflow_concurrency.py
+!offline-backend-20260512/backend/tests/test_workflow_schema_rebuild.py
+# Writing-mode first-report pipeline enforcement regressions.
 !offline-backend-20260512/backend/tests/test_writing_mode_report_middleware.py
 !offline-backend-20260512/backend/tests/test_writing_rewrite_prompt.py
 # LLM call timeout retry classification regression coverage.
 !offline-backend-20260512/backend/tests/test_llm_error_handling_middleware.py
 # Writing-mode pipeline conversation-material regressions.
 !offline-backend-20260512/backend/tests/test_deep_research_report_tool.py
+# Report collaboration (RC-BE-000–018) regression coverage.
+!offline-backend-20260512/backend/tests/test_report_collaboration_*.py
+!offline-backend-20260512/backend/tests/test_ensure_orm_columns_sync.py
 deploy
 .history