Merge remote-tracking branch 'origin/main' into feature/ORCH-036-orch-36-deploy-b

# Conflicts:
#	.env.example
#	CHANGELOG.md
#	docs/architecture/README.md
#	docs/operations/INFRA.md
#	src/config.py

.env.example

@@ -71,3 +71,20 @@ ORCH_DEPLOY_PROD_TARGET_PORT=8500
 ORCH_DEPLOY_PROD_TARGET_IMAGE=orchestrator-orchestrator
 ORCH_DEPLOY_PROD_COMPOSE_PROFILE=
 ORCH_DEPLOY_PROD_PREV_IMAGE_FILE=.deploy-prev-image-prod
+
+# ORCH-053: stuck-task reconciler (sweeper for lost webhooks). A background daemon
+# replays a missed stage transition through the SAME gates/handlers a webhook would,
+# fixing tasks that got stuck on a dropped event (502 on rebuild, no Plane/Gitea
+# retries, unresolved sha->branch).
+#   ENABLED            -> global kill-switch (self-hosting safety / staged rollout).
+#   PLANE_ENABLED      -> separate flag for the F-2 Plane-API poll (mute only F-2).
+#   INTERVAL_S         -> background sweep period (seconds).
+#   GRACE_DEFAULT_S    -> default "stuck" threshold on tasks.updated_at (seconds).
+#   GRACE_OVERRIDES_JSON -> per-stage thresholds, e.g. {"development":300}; bad JSON -> default.
+#   NOTIFY_UNBLOCK     -> send a Telegram message when a stuck task is unblocked.
+ORCH_RECONCILE_ENABLED=true
+ORCH_RECONCILE_PLANE_ENABLED=true
+ORCH_RECONCILE_INTERVAL_S=120
+ORCH_RECONCILE_GRACE_DEFAULT_S=600
+ORCH_RECONCILE_GRACE_OVERRIDES_JSON=
+ORCH_RECONCILE_NOTIFY_UNBLOCK=true