feat(chart): split image.name into image.registry + image.name

Support global.image.registry/pullPolicy/pullSecrets from the parent
agent chart. Use extensionlib helpers for image resolution.

Adds image.pullSecrets support and NOTES.txt deprecation warning for
legacy image.name format containing a registry prefix.

Author: joshiste

charts/steadybit-extension-postman/Chart.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: extensionlib
-  repository: https://steadybit.github.io/helm-charts
-  version: 1.4.7
-digest: sha256:9a7feb18ae4c94e12dc7788d867b188e8606dc40c32433702dc4e4995462dd55
-generated: "2025-01-14T16:48:46.974094+01:00"
+  repository: file://../../../helm-charts/charts/extensionlib
+  version: 1.5.0
+digest: sha256:604653850bb489aa6a00c999db7bb54bef8000675a59d9fca951b8e139bd51ff
+generated: "2026-02-24T19:10:34.972753+01:00"

charts/steadybit-extension-postman/charts/extensionlib-1.4.7.tgz

@@ -0,0 +1 @@
+{{ include "extensionlib.image.deprecationNotice" . }}

charts/steadybit-extension-postman/charts/extensionlib-1.5.0.tgz

@@ -43,9 +43,10 @@ spec:
       securityContext:
       {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- include "extensionlib.imagePullSecrets" . | nindent 6 }}
       containers:
-        - image: {{ .Values.image.name }}:{{ default .Chart.AppVersion .Values.image.tag }}
-          imagePullPolicy: {{ .Values.image.pullPolicy }}
+        - image: {{ include "extensionlib.image" . }}
+          imagePullPolicy: {{ include "extensionlib.imagePullPolicy" . }}
           name: extension
           resources:
             requests: