Add pagination support to get_comments

- Add page parameter to get_comments (default: 1)
- Parse X-Total-Count header for total comments count
- Parse Link header for next_page indicator
- Update FastMCP tool and CLI server to return pagination metadata

Response now includes total_count and next_page fields to help
clients navigate through paginated comments.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

search_utils.py

@@ -467,7 +467,8 @@ class BasecampSearch:
         try:
             # If both recording_id and bucket_id are provided, get comments for that specific recording
             if recording_id and bucket_id:
-                comments = self.client.get_comments(recording_id, bucket_id)
+                result = self.client.get_comments(recording_id, bucket_id)
+                comments = result["comments"]
             # Otherwise we can't search across all comments as there's no endpoint for that
             else:
                 logger.warning("Cannot search all comments across Basecamp - both recording_id and bucket_id are required")