Add custom image support for all Helm chart components

- Add initContainer.image config for busybox (wait containers)
- Add image config for PostgreSQL, MinIO, Redis subcharts
- Update deployment.yaml and migration-job.yaml to use configurable images
- Enables air-gapped deployments with private registries

helm/orchard/values.yaml

@@ -10,6 +10,13 @@ imagePullSecrets: []
 nameOverride: ""
 fullnameOverride: ""
 
+# Init container image (used for wait-for-db, wait-for-minio)
+initContainer:
+  image:
+    repository: busybox
+    tag: "1.36"
+    pullPolicy: IfNotPresent
+
 serviceAccount:
   create: true
   automount: true
@@ -113,6 +120,11 @@ orchard:
 # PostgreSQL subchart configuration
 postgresql:
   enabled: true
+  image:
+    registry: docker.io
+    repository: bitnami/postgresql
+    tag: "15"
+    pullPolicy: IfNotPresent
   auth:
     username: orchard
     password: orchard-password
@@ -125,6 +137,11 @@ postgresql:
 # MinIO subchart configuration
 minio:
   enabled: true
+  image:
+    registry: docker.io
+    repository: bitnami/minio
+    tag: "latest"
+    pullPolicy: IfNotPresent
   auth:
     rootUser: minioadmin
     rootPassword: minioadmin
@@ -136,6 +153,11 @@ minio:
 # Redis subchart configuration (for future caching)
 redis:
   enabled: false
+  image:
+    registry: docker.io
+    repository: bitnami/redis
+    tag: "7.2"
+    pullPolicy: IfNotPresent
   auth:
     enabled: true
     password: redis-password