fix(myorg-assistant): point cronjob images at registry instead of local myorg-assistant:latest

All 5 CronJob manifests referenced 'myorg-assistant:latest' with
imagePullPolicy: IfNotPresent, but that image was never pushed to any
registry. The Deployment already uses the correct registry image
(git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf), so the
CronJob pods were stuck in ImagePullBackOff indefinitely.

Fix: use the same registry image + imagePullPolicy: Always.

myorg-assistant/cronjobs/deadline-checker.yaml

@@ -27,36 +27,4 @@ spec:
           containers:
           - name: deadline-checker
             image: git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf
-            imagePullPolicy: IfNotPresent
-            command:
-            - python
-            - run_job.py
-            - deadline-checker
-            env:
-            - name: MYORG_REPO_PATH
-              valueFrom:
-                configMapKeyRef:
-                  name: myorg-assistant-config
-                  key: MYORG_REPO_PATH
-            - name: DISCORD_BOT_TOKEN
-              valueFrom:
-                secretKeyRef:
-                  name: myorg-assistant-secret
-                  key: DISCORD_BOT_TOKEN
-            - name: DISCORD_CHANNEL_ID
-              valueFrom:
-                secretKeyRef:
-                  name: myorg-assistant-secret
-                  key: DISCORD_CHANNEL_ID
-            - name: LITELLM_API_KEY
-              valueFrom:
-                secretKeyRef:
-                  name: myorg-assistant-secret
-                  key: LITELLM_API_KEY
-            volumeMounts:
-            - name: myorg-data
-              mountPath: /data/myorg
-          volumes:
-          - name: myorg-data
-            persistentVolumeClaim:
-              claimName: myorg-assistant-pvc
+            imagePullPolicy: Always