5c2014cb11
Fixes the bug where watcher stayed stuck on old sessions after /new or /reset. Changes: - Added file_score() function combining mtime + size for better detection - Added INACTIVITY_THRESHOLD (30s) - if no new data, check for active session - Tracks last_data_time and file size to detect stale sessions - Switches to newer session when current is inactive The previous v1.1 fix (mtime polling) was incomplete because new sessions can have older mtime than recently-written old sessions. Tested: Watcher now properly follows session rotation on /new and /reset