feat(monitoring): observability stack + app instrumentation

- /health/ready (DB+MinIO+Casdoor checks, webhook post-deploy gate),
  /metrics via prometheus-fastapi-instrumentator, Sentry/GlitchTip capture,
  X-Request-ID middleware + JSON access logging (PROCUREMENT_LOG_FORMAT)
- server-side analytics (OpenPanel Track API): login, quote lifecycle,
  receipts — fire-and-forget, disabled without env config
- monitoring/ compose project: GlitchTip(+pg), Prometheus(+alerts),
  Grafana(provisioned ERP dashboard), Loki+Promtail, node/postgres
  exporters, cAdvisor — mem-limited (~2.2GB), loopback admin UIs,
  separate from app deploys; erp_shared network for scraping
- frontend: @openpanel/web + @sentry/react (build-arg gated, no-op when
  unset), funnel events (login, wizard steps, quote submitted)
- compose: api healthcheck, observability env wiring, .env.example keys

backend/app/services/analytics.py

@@ -0,0 +1,76 @@
+"""Server-side product analytics — OpenPanel Track API.
+
+Fire-and-forget business events (quote lifecycle, receipts, logins) so the
+OpenPanel dashboards show what actually happens inside the ERP, not just
+page views. Never raises: analytics must not break a business flow.
+
+Configuration (all optional — disabled when any is missing):
+    PROCUREMENT_OPENPANEL_API_URL     e.g. http://openpanel-api:3333 (self-hosted)
+    PROCUREMENT_OPENPANEL_CLIENT_ID   project client id (write mode)
+    PROCUREMENT_OPENPANEL_CLIENT_SECRET  project client secret
+
+Contract (OpenPanel Track API): POST {API_URL}/track with headers
+``openpanel-client-id`` / ``openpanel-client-secret`` and a JSON body
+``{"type": "track"|"identify", "profileId": ..., "event"/"properties": ...}``.
+"""
+import logging
+from typing import Any
+
+import httpx
+
+from app.config import settings
+
+logger = logging.getLogger("procurement.analytics")
+
+_TIMEOUT = httpx.Timeout(3.0)
+
+
+def _configured() -> bool:
+    return bool(
+        settings.OPENPANEL_API_URL
+        and settings.OPENPANEL_CLIENT_ID
+        and settings.OPENPANEL_CLIENT_SECRET
+    )
+
+
+async def track(event: str, properties: dict[str, Any] | None = None, profile_id: str | None = None) -> None:
+    """Record a named event; swallows every error."""
+    if not _configured():
+        return
+    body = {
+        "type": "track",
+        "event": event,
+        "properties": properties or {},
+    }
+    if profile_id:
+        body["profileId"] = profile_id
+    try:
+        async with httpx.AsyncClient(timeout=_TIMEOUT) as client:
+            await client.post(
+                f"{settings.OPENPANEL_API_URL.rstrip('/')}/track",
+                json=body,
+                headers={
+                    "openpanel-client-id": settings.OPENPANEL_CLIENT_ID,
+                    "openpanel-client-secret": settings.OPENPANEL_CLIENT_SECRET,
+                },
+            )
+    except Exception as exc:  # noqa: BLE001 — analytics must never raise
+        logger.debug("analytics track failed (%s): %s", event, exc)
+
+
+async def identify(profile_id: str, properties: dict[str, Any] | None = None) -> None:
+    """Create/update a user profile (e.g. on login)."""
+    if not _configured():
+        return
+    try:
+        async with httpx.AsyncClient(timeout=_TIMEOUT) as client:
+            await client.post(
+                f"{settings.OPENPANEL_API_URL.rstrip('/')}/track",
+                json={"type": "identify", "profileId": profile_id, "properties": properties or {}},
+                headers={
+                    "openpanel-client-id": settings.OPENPANEL_CLIENT_ID,
+                    "openpanel-client-secret": settings.OPENPANEL_CLIENT_SECRET,
+                },
+            )
+    except Exception as exc:  # noqa: BLE001
+        logger.debug("analytics identify failed: %s", exc)

backend/app/services/quote_service.py

@@ -4,6 +4,7 @@ Every mutation here runs in ONE ``async with db.begin()`` block; any failure
 rolls the whole operation back. All state changes log a quote_event in the
 same transaction.
 """
+import asyncio
 import logging
 from datetime import date, datetime, timezone
 from uuid import UUID
@@ -33,6 +34,7 @@ from app.schemas.procurement import (
     QuoteUpdate,
     RejectQuoteIn,
 )
+from app.services import analytics
 from app.services.material_service import ensure_brand_material_belong
 from app.utils.errors import ConflictError, NotFoundError, ValidationError
 
@@ -56,6 +58,19 @@ def utcnow() -> datetime:
 
 def _add_event(db: AsyncSession, quote_id: UUID, event_type: str, payload: dict | None = None, actor: str | None = None) -> None:
     db.add(QuoteEvent(quote_id=quote_id, event_type=event_type, payload=payload or {}, actor=actor))
+    # Product analytics (fire-and-forget, never blocks or raises): the whole
+    # quote lifecycle funnels through here, so one hook covers every
+    # status transition for the OpenPanel dashboards.
+    try:
+        asyncio.get_running_loop().create_task(
+            analytics.track(
+                f"quote_{event_type}",
+                {"quote_id": str(quote_id), "actor": actor, **(payload or {})},
+                profile_id=actor,
+            )
+        )
+    except RuntimeError:  # no running loop (defensive — callers are async)
+        pass
 
 
 async def get_quote_or_404(db: AsyncSession, quote_id: UUID) -> Quote: