feat(infra): p6 hardening - observability and deploy compose

- 5 NestJS services add /metrics endpoint via app.getHttpAdapter()
- prometheus.yml scales to 8 services with rule_files and alertmanager
- monitoring compose replaces blackbox with Loki+Promtail
- Grafana datasource adds Loki
- docker-compose.deploy.yml scales to 11 services
- deploy.env.example completes Neo4j/ES/ClickHouse/LLM vars
- teacher-bff adds health.controller
- CI removes continue-on-error on lint step
- teacher-portal lint script changed to eslint src

apps/teacher-portal/src/app/(app)/classes/page.tsx

@@ -51,7 +51,6 @@ export default function ClassesPage() {
     } finally {
       setLoading(false);
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
   useEffect(() => {

apps/teacher-portal/src/app/(app)/exams/page.tsx

@@ -56,7 +56,6 @@ export default function ExamsPage() {
     } finally {
       setLoading(false);
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [classId]);
 
   useEffect(() => {

apps/teacher-portal/src/app/(app)/grades/page.tsx

@@ -52,7 +52,6 @@ export default function GradesPage() {
     } finally {
       setLoading(false);
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [examId]);
 
   useEffect(() => {

apps/teacher-portal/src/app/(app)/homework/page.tsx

@@ -54,7 +54,6 @@ export default function HomeworkPage() {
     } finally {
       setLoading(false);
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [classId]);
 
   useEffect(() => {