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

frontend/src/pages/Auth/LoginPage.tsx

@@ -3,6 +3,7 @@ import { useNavigate } from "react-router-dom";
 import { toast } from "sonner";
 import { ClipboardList, Eye, EyeOff, Loader2, Lock, ShieldCheck, Wrench, X } from "lucide-react";
 import { api, apiV26 } from "../../lib/api";
+import { identifyUser, track } from "../../lib/analytics";
 import { useAuthStore } from "../../store/auth";
 import type { Project } from "../../lib/types";
 
@@ -78,6 +79,9 @@ export function LoginPage() {
       }
       setToken(access_token);
       setUser(user);
+      // تحلیل رفتار (no-op بدون تنظیمات VITE_OPENPANEL_*)
+      identifyUser({ id: user.id, name: user.display_name, role: user.role });
+      track("login_success", { role: user.role });
       toast.success(`خوش آمدید، ${user.display_name}`);
       // مدیر پروژه → پنل انبار؛ مدیر تدارکات/ادمین → دفتر پیشنهادهای خرید
       navigate(user.role === "pm" ? "/inventory" : "/");