scale down non-critical services to free cluster memory

- authentik server: 3→2, worker: 3→2, PDB minAvailable: 2→1
- tuya-bridge: 3→1
- realestate-crawler-api: 2→1
- claude-memory: 2→1
- grafana: 2→1 (config only, apply pending)
- alertmanager: 2→1 (config only, apply pending)

Estimated savings: ~1.2 Gi total

stacks/authentik/modules/authentik/values.yaml

@@ -16,7 +16,7 @@ authentik:
     host: ${redis_host}
 
 server:
-  replicas: 3
+  replicas: 2
   strategy:
     type: RollingUpdate
     rollingUpdate:
@@ -44,12 +44,12 @@ server:
     diun.include_tags: "^202[0-9].[0-9]+.*$" # no need to annotate the worker as it uses the same image
   pdb:
     enabled: true
-    minAvailable: 2
+    minAvailable: 1
 global:
   addPrometheusAnnotations: true
 
 worker:
-  replicas: 3
+  replicas: 2
   strategy:
     type: RollingUpdate
     rollingUpdate: