Clean up obsolete files and refresh MkDocs site

Remove unused planning docs (FEDERATION_PLAN.md, SERVICE_INTEGRATIONS.md),
temporary screenshots, update .gitignore for Playwright MCP logs, and
refresh MkDocs site build with updated repo data.

Bunker Admin

mkdocs/site/comments/callback/index.html

@@ -73,7 +73,7 @@
   <script>
 (function () {
   // API URL injected from MkDocs config.extra (set by env_config_hook.py)
-  var apiUrl = "http://localhost:4002";
+  var apiUrl = "https://api.cmlite.org";
   if (!apiUrl) return;
 
   var trackUrl = apiUrl + "/api/docs-analytics/track";