Refactor store dwell alert management API and dwell engine

- Updated argument parsing in manage_api.py to include new threshold parameters.
- Enhanced _config_payload to include thresholds and webhook configurations.
- Modified _build_summary to track queue metrics and adjust alert reporting.
- Refactored DwellEngine to utilize queue thresholds for alerting and reporting.
- Added queue metrics calculations and status change tracking in dwell_engine.py.
- Updated notifier.py to support posting JSON events to webhooks.
- Adjusted example configuration to reflect new threshold parameters.
- Enhanced Docker entrypoint script for better process management.
- Updated tests to cover new queue metrics and thresholds.
- Improved ManagedServiceDetail and ManagedServices Vue components to display queue metrics.

managed/people_flow_project/src/people_flow/webhook.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from urllib import request
+
+
+def dispatch_json_event(
+    path: str | Path,
+    payload: dict,
+    webhook_url: str = "",
+    timeout_seconds: float = 5.0,
+) -> None:
+    output_path = Path(path)
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    with output_path.open("a", encoding="utf-8") as handle:
+        handle.write(json.dumps(payload, ensure_ascii=False) + "\n")
+
+    if not webhook_url.strip():
+        return
+
+    req = request.Request(
+        url=webhook_url,
+        data=json.dumps(payload).encode("utf-8"),
+        method="POST",
+    )
+    req.add_header("Content-Type", "application/json")
+    with request.urlopen(req, timeout=timeout_seconds):
+        return