Update default-repository.json: Gitea-primary, required workflows list

- .github description updated: Gitea primary, GitHub backup
- Added requiredFiles list for standard shared workflows
- workflows directory now requirementStatus: required

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

definitions/default/default-repository.json

@@ -142,15 +142,24 @@
       {
         "name": ".github",
         "path": ".github",
-        "description": "GitHub-specific configuration",
+        "description": "Gitea/GitHub Actions configuration (Gitea reads .github/workflows natively)",
         "requirementStatus": "required",
-        "purpose": "Contains GitHub Actions workflows and configuration",
+        "purpose": "Contains CI/CD workflows and repository configuration. Gitea is the primary platform; GitHub is backup only.",
         "subdirectories": [
           {
             "name": "workflows",
             "path": ".github/workflows",
-            "description": "GitHub Actions workflows",
-            "requirementStatus": "suggested"
+            "description": "CI/CD workflows (Gitea-primary, GitHub-compatible)",
+            "requirementStatus": "required",
+            "requiredFiles": [
+              "auto-assign.yml",
+              "auto-dev-issue.yml",
+              "auto-release.yml",
+              "branch-freeze.yml",
+              "changelog-validation.yml",
+              "repository-cleanup.yml",
+              "sync-version-on-merge.yml"
+            ]
           }
         ]
       },