style: prettier formatting for edu_master alerts and postgres readme

edu_master/k8s/alerts.yaml

@@ -31,7 +31,7 @@ spec:
             severity: critical
           annotations:
             summary: "Webinar checker failing consecutively"
-            description: "edu-master/webinar-checker: {{ $value }} consecutive webinar check failures (timeout / playwright error / page error). Check pod logs (Loki: {namespace=\"edu-master\", container=\"webinar-checker\"})."
+            description: 'edu-master/webinar-checker: {{ $value }} consecutive webinar check failures (timeout / playwright error / page error). Check pod logs (Loki: {namespace="edu-master", container="webinar-checker"}).'
 
         # Metrics endpoint not scraped for 10m: pod down, metrics server dead, or ServiceMonitor broken.
         - alert: WebinarCheckerScrapeDown