Fix EventType detection: movieFileRenamed is 8, not 7

Found via database inspection:
- The Matrix first event: EventType 8 (movieFileRenamed)
- Followed by EventType 3 (downloadFolderImported) upgrade
- Was checking for EventType 7, should be EventType 8

This should now correctly detect rename-first scenarios
and prefer digital release dates over upgrade dates.

clients/radarr_db_client.py

@@ -260,7 +260,7 @@ class RadarrDbClient:
         Check if the first event in history is rename-based (not a true import)
         
         This helps identify movies where:
-        - First event: movieFileRenamed (EventType = 7)
+        - First event: movieFileRenamed (EventType = 8)
         - Followed by: downloadFolderImported (EventType = 3) - this is an upgrade
         
         In such cases, we should prefer release dates over the upgrade date
@@ -294,8 +294,8 @@ class RadarrDbClient:
                         _log("INFO", f"  Event {i+1}: Type={event_type}, Date={event_date}")
                     
                     first_event_type = rows[0]['event_type'] if self.db_type == "postgresql" else rows[0][0]
-                    # EventType 7 = movieFileRenamed  
-                    is_rename_first = first_event_type == 7
+                    # EventType 8 = movieFileRenamed (not 7 as originally thought!)
+                    is_rename_first = first_event_type == 8
                     _log("INFO", f"Movie {movie_id}: First event type={first_event_type}, is_rename_first={is_rename_first}")
                     return is_rename_first
                 else: