fix: restrict Claude workflows to only bvdaakster user

- Change issue implementation workflow to only allow bvdaakster
- Update code review workflow to only trigger for bvdaakster's PRs
- Update configuration to reflect single-user access
- Remove other privileged users from the list

Only bvdaakster can now:
- Trigger Claude issue implementations with @claude comments
- Have PRs automatically reviewed by Claude

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.github/workflows/claude-code-review.yml

@@ -12,11 +12,8 @@ on:
 
 jobs:
   claude-review:
-    # Permission filter: Only allow specific users or admins to trigger reviews
-    if: |
-      contains(fromJSON('["bastiaan", "xtr-dev-team"]'), github.event.pull_request.user.login) ||
-      github.event.pull_request.author_association == 'OWNER' ||
-      github.event.pull_request.author_association == 'MEMBER'
+    # Permission filter: Only allow bvdaakster to trigger reviews
+    if: github.event.pull_request.user.login == 'bvdaakster'
 
     # Alternative filters (comment out the above and use one of these):
     # Only for external contributors: