Allow implicit octals in yamllint and normalize k8s mode values

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.yamllint.yaml

@@ -21,7 +21,7 @@ rules:
   # Required for ansible-lint compatibility
   comments-indentation: false
   octal-values:
-    forbid-implicit-octal: true
+    forbid-implicit-octal: false
     forbid-explicit-octal: true
 
 ignore:

argocd/manifests/kiwix/deployment.yaml

@@ -96,4 +96,4 @@ spec:
         - name: sync-script
           configMap:
             name: zim-torrent-sync-script
-            defaultMode: 493  # 0755 in decimal
+            defaultMode: 0755

argocd/manifests/ollama/deployment.yaml

@@ -85,4 +85,4 @@ spec:
         - name: sync-script
           configMap:
             name: ollama-sync-script
-            defaultMode: 0755 # yamllint disable-line rule:octal-values
+            defaultMode: 0755

docs/changelog.d/implicit-octal.infra.md

@@ -0,0 +1 @@
+Allow implicit octals in yamllint and use `0755` directly in k8s manifests instead of decimal or disable-line comments.