The previous hardening pass still dropped source diagnostics and data-quality context once live-mode serialized a dual-lane failure. Keep those fields when a structured CombinedSignalFailure reaches the websocket layer so consumers can distinguish provider mismatch, stale data, and other degraded cases even when no final signal exists.
Constraint: Follow-on fix after 63858bf should stay minimal and not reopen unrelated executor/calendar work
Rejected: Fold this into a larger amend of the prior commit | history is already shared and the delta is a single behavioral correction
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: When failure exceptions carry structured diagnostics, live serializers must preserve them instead of flattening to a generic message
Tested: python -m pytest web_dashboard/backend/tests/test_executors.py web_dashboard/backend/tests/test_services_migration.py web_dashboard/backend/tests/test_api_smoke.py orchestrator/tests/test_market_calendar.py orchestrator/tests/test_live_mode.py orchestrator/tests/test_application_service.py orchestrator/tests/test_quant_runner.py orchestrator/tests/test_llm_runner.py -q
Tested: python -m compileall orchestrator web_dashboard/backend
Tested: npm run build (web_dashboard/frontend)
Not-tested: real websocket consumers against provider-backed failure paths
Team execution produced recoverable commits for market-holiday handling, live websocket contracts, regression coverage, and the remaining frontend contract-view polish. Recover those changes into main without waiting for terminal team shutdown, preserving the verified payload semantics while avoiding the worker auto-checkpoint noise.
Constraint: Team workers were still in progress, so recovery had to avoid destructive shutdown and ignore the worker-3 uv.lock churn
Rejected: Wait for terminal shutdown before recovery | unnecessary delay once commits were already recoverable and verified
Rejected: Cherry-pick worker-3 checkpoint wholesale | would import unrelated uv.lock churn into main
Confidence: high
Scope-risk: moderate
Reversibility: clean
Directive: Treat team INTEGRATED mailbox messages as hints only; always inspect snapshot refs/worktrees before claiming the leader actually merged code
Tested: python -m pytest orchestrator/tests/test_market_calendar.py orchestrator/tests/test_quant_runner.py orchestrator/tests/test_application_service.py orchestrator/tests/test_live_mode.py web_dashboard/backend/tests/test_api_smoke.py -q
Tested: python -m compileall orchestrator web_dashboard/backend
Tested: npm run build (web_dashboard/frontend)
Not-tested: final team terminal completion after recovery
Not-tested: real websocket clients or live provider-backed market holiday sessions
陈少杰