Phase 0 go-live polish: hands-off incremental sync + refresh action

- backend/ingest/sync_scheduler.py: periodic incremental-sync loop (every
  CRM_INGEST_SYNC_INTERVAL_MIN min); resilient, --once for testing.
- start9/0.4: "Refresh search index" action (incremental sync.py); entrypoint
  launches the scheduler as a background process when Spark/Qdrant are set;
  CRM_INGEST_SYNC_INTERVAL_MIN env; pre-release note on fastembed/mcp pins.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

start9/0.4/docker_entrypoint.sh

@@ -73,6 +73,23 @@ export CRM_DB_PATH="${CRM_DB_PATH:-$DATA_DIR/crm.db}"
 export SPARK_CONTROL_URL="${SPARK_CONTROL_URL:-https://192.168.1.72:62419}"
 export SPARK_CONTROL_VERIFY_TLS="${SPARK_CONTROL_VERIFY_TLS:-false}"
 export QDRANT_URL="${QDRANT_URL:-http://192.168.1.87:6333}"
+# OPERATOR: how often (minutes) the background sync scheduler re-runs the
+# incremental ingest sync to keep the Qdrant search index fresh. Default 60.
+export CRM_INGEST_SYNC_INTERVAL_MIN="${CRM_INGEST_SYNC_INTERVAL_MIN:-60}"
+
+# ── Background ingest sync scheduler ────────────────────────────
+# Keep the Qdrant search index fresh hands-off: sync_scheduler.py loops the
+# incremental sync every CRM_INGEST_SYNC_INTERVAL_MIN minutes. It runs as a
+# BACKGROUND process (not a StartOS daemon) — see INGEST_PACKAGING.md for the
+# daemon-vs-background-process tradeoff. Started only when ingest is configured,
+# i.e. both Spark Control and Qdrant endpoints are set; otherwise the loop would
+# just error every interval with nothing to talk to.
+if [ -n "${SPARK_CONTROL_URL:-}" ] && [ -n "${QDRANT_URL:-}" ]; then
+  (cd /app/backend/ingest && CRM_DB_PATH=/data/crm.db python3 sync_scheduler.py --db /data/crm.db >> /data/ingest-sync.log 2>&1 &)
+  echo "[entrypoint] ingest sync scheduler: STARTED"
+else
+  echo "[entrypoint] ingest sync scheduler: SKIPPED (Spark/Qdrant not configured)"
+fi
 
 # ── Launch the app ──────────────────────────────────────────────
 exec python3 /app/backend/server.py