fix(ci): skip namespace check for package manifests, secrets already set

Package type extensions (pkg_*) don't have <namespace> tags — only
component/plugin manifests do. Skip the check when type="package".

Authored-by: Moko Consulting
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.mokogitea/workflows/ci-joomla.yml

@@ -124,8 +124,13 @@ jobs:
               echo "Manifest is well-formed XML." >> $GITHUB_STEP_SUMMARY
             fi
 
-            # Check required tags: name, version, author, namespace (Joomla 5+)
-            for TAG in name version author namespace; do
+            # Check required tags
+            REQUIRED_TAGS="name version author"
+            # namespace is only required for non-package extensions
+            if ! grep -q 'type="package"' "$MANIFEST" 2>/dev/null; then
+              REQUIRED_TAGS="$REQUIRED_TAGS namespace"
+            fi
+            for TAG in $REQUIRED_TAGS; do
               if ! grep -q "<${TAG}>" "$MANIFEST" 2>/dev/null; then
                 echo "Missing required tag: \`<${TAG}>\`" >> $GITHUB_STEP_SUMMARY
                 ERRORS=$((ERRORS + 1))