Revert "fix(temporal): disable cassandra sub-chart and schema jobs, server uses PostgreSQL only"

This reverts commit d51056c684.

k8s/applications/temporal/temporal-values.yaml

@@ -8,7 +8,18 @@ postgresql:
   enabled: false
 
 cassandra:
-  enabled: false
+  enabled: true
+  persistence:
+    enabled: false
+  image:
+    repo: cassandra
+    tag: 3.11.3
+  config:
+    cluster_size: 1
+    ports:
+      cql: 9042
+  service:
+    type: ClusterIP
 
 elasticsearch:
   enabled: false
@@ -17,8 +28,6 @@ elasticsearch:
 jobs:
   autoSetup:
     enabled: false
-  schema:
-    enabled: false
 
 # ── Temporal server config (PostgreSQL persistence) ──────────────────────────────
 server: