fix(k3s): change SQL Server liveness probe to TCP

- Replace exec probe with sqlcmd (password expansion issue) with TCP probe
- Add startupProbe for slow SQL Server startup on low memory
- Increase initialDelaySeconds to give SQL Server time to start
- This fixes the continuous restarts due to "Login failed for user 'sa'"

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

deploy/k3s/sqlserver.yaml

@@ -60,27 +60,25 @@ spec:
               memory: "768Mi"
               cpu: "1000m"
           livenessProbe:
-            exec:
-              command:
-                - /opt/mssql-tools/bin/sqlcmd
-                - -S
-                - localhost
-                - -U
-                - sa
-                - -P
-                - $(MSSQL_SA_PASSWORD)
-                - -Q
-                - SELECT 1
-            initialDelaySeconds: 60
+            tcpSocket:
+              port: 1433
+            initialDelaySeconds: 90
             periodSeconds: 30
-            timeoutSeconds: 10
-            failureThreshold: 5
+            timeoutSeconds: 5
+            failureThreshold: 3
           readinessProbe:
+            tcpSocket:
+              port: 1433
+            initialDelaySeconds: 45
+            periodSeconds: 10
+            timeoutSeconds: 5
+          startupProbe:
             tcpSocket:
               port: 1433
             initialDelaySeconds: 30
-            periodSeconds: 15
-            timeoutSeconds: 10
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 18
       volumes:
         - name: sqlserver-data
           persistentVolumeClaim: