refactor: remove GitLab CI config and docs after full Gitea migration

- Delete .gitlab-ci.yml (replaced by .gitea/workflows/ci.yml)
- Delete docs/deployment/gitlab.md (superseded by gitea.md)
- Update audit rules to reference .gitea/workflows/*.yml
- Update validate_audit.py to check Gitea CI paths
- Clean up GitLab references in gitea.md, mkdocs.yml, .dockerignore
- Mark IPv6 AAAA records as completed in hetzner docs

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

scripts/validate/validate_audit.py

@@ -264,27 +264,23 @@ class AuditValidator(BaseValidator):
                 str(self.project_root),
             )
 
-        # Check CI/CD exists (GitHub or GitLab)
+        # Check CI/CD exists (Gitea or GitHub)
+        gitea_ci = self.project_root / ".gitea" / "workflows" / "ci.yml"
         github_ci = self.project_root / ".github" / "workflows" / "ci.yml"
-        gitlab_ci = self.project_root / ".gitlab-ci.yml"
-        if not github_ci.exists() and not gitlab_ci.exists():
+        if not gitea_ci.exists() and not github_ci.exists():
             self.add_warning(
                 "COMP-EVID-001",
                 "CI workflow for automated testing recommended",
-                ".gitlab-ci.yml or .github/workflows/ci.yml",
+                ".gitea/workflows/ci.yml or .github/workflows/ci.yml",
             )
 
-        # Check code review process (GitHub or GitLab)
+        # Check code review process
         github_pr_template = self.project_root / ".github" / "PULL_REQUEST_TEMPLATE.md"
-        gitlab_mr_templates = self.project_root / ".gitlab" / "merge_request_templates"
-        has_mr_template = github_pr_template.exists() or (
-            gitlab_mr_templates.exists() and any(gitlab_mr_templates.iterdir())
-        )
-        if not has_mr_template:
+        if not github_pr_template.exists():
             self.add_warning(
                 "COMP-POL-001",
-                "Merge request template recommended for code review",
-                ".gitlab/merge_request_templates/ or .github/PULL_REQUEST_TEMPLATE.md",
+                "Pull request template recommended for code review",
+                ".github/PULL_REQUEST_TEMPLATE.md",
             )
 
     # ==================
@@ -371,19 +367,13 @@ class AuditValidator(BaseValidator):
                 "pyproject.toml",
             )
 
-        # Check for dependency scanning (GitHub Dependabot or GitLab)
+        # Check for dependency scanning
         dependabot = self.project_root / ".github" / "dependabot.yml"
-        gitlab_ci = self.project_root / ".gitlab-ci.yml"
-        has_dep_scanning = dependabot.exists()
-        if not has_dep_scanning and gitlab_ci.exists():
-            # Check if GitLab CI includes dependency scanning
-            ci_content = gitlab_ci.read_text()
-            has_dep_scanning = "dependency_scanning" in ci_content.lower()
-        if not has_dep_scanning:
+        if not dependabot.exists():
             self.add_info(
                 "THIRD-VULN-002",
                 "Consider enabling dependency scanning for security updates",
-                ".gitlab-ci.yml (include dependency_scanning) or .github/dependabot.yml",
+                ".github/dependabot.yml",
             )
 
         # Check for insecure package sources