feat: integrate Sentry + fix CI/CD issues

Sentry Integration (補強 SignOz):
- Add @sentry/nextjs for frontend error tracking + session replay
- Add sentry-sdk[fastapi] for backend error tracking
- Create sentry.client/server/edge.config.ts
- Integrate with next.config.js + instrumentation.ts
- Add Sentry exception capture in FastAPI error handler
- Create deployment scripts for Self-Hosted @ 192.168.0.110

CI/CD Fixes:
- Fix F821 Undefined name 'Field' in incidents.py
- Add NEXT_PUBLIC_API_URL env var to CI build step
- Add build-arg to Docker build verification

E2E Test Improvements:
- Fix strict mode violations in dashboard-acceptance tests
- Add timeout increase for Phase 4 demo tests
- Make tests more resilient to UI variations

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/pyproject.toml

@@ -24,6 +24,8 @@ dependencies = [
     "opentelemetry-instrumentation-fastapi>=0.41b0",
     "opentelemetry-instrumentation-httpx>=0.41b0",
     "opentelemetry-instrumentation-logging>=0.41b0",
+    # Sentry (Error Tracking - 補強 SignOz，Self-Hosted @ 192.168.0.110)
+    "sentry-sdk[fastapi]>=2.0.0",
     # Phase 6.4g: leWOOOgo Brain - 積木化決策引擎
     # NOTE: Local packages 透過 Dockerfile 預先安裝，無需在此列出
     # 請參閱 apps/api/Dockerfile Phase 6.4i 註解