Fix: Resolve UnboundLocalError for processed_comments_count

- Ensures `processed_comments_count` is initialized to 0 at the
  beginning of the `main()` function scope, alongside other tracking
  variables like `latest_overall_review_activity_dt` and
  `latest_line_comment_activity_dt`.
- This prevents an `UnboundLocalError` when the script attempts to print
  the number of processed line comments in scenarios where the line
  comment processing loop is skipped (e.g., if no line comments are fetched).

This commit finalizes fixes for variable initialization and scoping issues.

Author: google-labs-jules[bot]

scripts/print_github_reviews.py

@@ -284,6 +284,11 @@ def parse_repo_url(url_string):
     args = parser.parse_args()
     error_suffix = " (use --help for more details)"
 
+    # Initialize tracking variables early, including processed_comments_count
+    latest_overall_review_activity_dt = None
+    latest_line_comment_activity_dt = None
+    processed_comments_count = 0
+
     if not args.token:
         sys.stderr.write(f"Error: GitHub token not provided. Set GITHUB_TOKEN or use --token.{error_suffix}\n")
         sys.exit(1)
@@ -474,10 +479,8 @@ def parse_repo_url(url_string):
     # Note: The decision to exit if only line comments fail vs. if only overall reviews fail could be nuanced.
     # For now, failure to fetch either is treated as a critical error for the script's purpose.
 
-    # Initialize tracking variables early - MOVED TO TOP OF MAIN
-    # latest_overall_review_activity_dt = None
-    # latest_line_comment_activity_dt = None
-    # processed_comments_count = 0 # This is specifically for line comments
+    # Initializations for latest_overall_review_activity_dt, latest_line_comment_activity_dt,
+    # and processed_comments_count have been moved to the top of the main() function.
 
     # Handling for line comments
     if not comments: # comments is an empty list here (None case handled above)