Enhance LRC and SR duration matching logic by increasing tolerance from 5 seconds to 10 seconds + improve LRC websocket broadcasting logic

lyric_search/sources/lrclib.py

@@ -81,7 +81,7 @@ class LRCLib:
 
                     # Filter by duration if provided
                     if duration:
-                        search_data = [r for r in search_data if abs(r.get("duration", 0) - duration) <= 5]
+                        search_data = [r for r in search_data if abs(r.get("duration", 0) - duration) <= 10]
 
                     if plain:
                         possible_matches = [