fix(myorg-assistant): fix CronJob image references to use Gitea registry image

CronJobs were referencing 'myorg-assistant:latest' (a local image that
doesn't exist in the cluster), causing ImagePullBackOff on all 4 active
CronJob pods. Updated all 5 CronJob manifests to use the same image as
the Deployment (git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf)
and added imagePullSecrets: gitea-registry for authentication.

myorg-assistant/cronjobs/deadline-checker.yaml

@@ -27,7 +27,7 @@ spec:
           containers:
           - name: deadline-checker
             image: git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf
-            imagePullPolicy: Always
+            imagePullPolicy: IfNotPresent
             command:
             - python
             - run_job.py

myorg-assistant/cronjobs/evening-summary.yaml

@@ -27,7 +27,7 @@ spec:
           containers:
           - name: evening-summary
             image: git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf
-            imagePullPolicy: Always
+            imagePullPolicy: IfNotPresent
             command:
             - python
             - run_job.py

myorg-assistant/cronjobs/git-sync.yaml

@@ -27,7 +27,7 @@ spec:
           containers:
           - name: git-sync
             image: git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf
-            imagePullPolicy: Always
+            imagePullPolicy: IfNotPresent
             command:
             - python
             - run_job.py

myorg-assistant/cronjobs/morning-briefing.yaml

@@ -27,7 +27,7 @@ spec:
           containers:
           - name: morning-briefing
             image: git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf
-            imagePullPolicy: Always
+            imagePullPolicy: IfNotPresent
             command:
             - python
             - run_job.py

myorg-assistant/cronjobs/waiting-followup.yaml

@@ -27,7 +27,7 @@ spec:
           containers:
           - name: waiting-followup
             image: git.rogi.casa/roger/myorg-assistant/myorg-assistant:fcf79bf
-            imagePullPolicy: Always
+            imagePullPolicy: IfNotPresent
             command:
             - python
             - run_job.py