fix: Only fallback to airdate when Sonarr has no import date

- Modified fallback logic to only use airdate as dateadded when source is NOT 'sonarr:history.import'
- This prevents using airdate fallback when Sonarr has valid import dates available
- Ensures Sonarr import dates are prioritized over airdate fallbacks
- Addresses issue where episodes with valid Sonarr import dates were still falling back to airdates

processors/tv_processor.py

@@ -131,8 +131,9 @@ class TVProcessor:
                     if not dateadded:
                         source = "external"
             
-            # Use air date as fallback for dateadded if available
-            if not dateadded and aired:
+            # ONLY use air date as fallback for dateadded if we have no Sonarr import date at all
+            # and if we couldn't get any import information from Sonarr history
+            if not dateadded and aired and source != "sonarr:history.import":
                 dateadded = aired
                 source = f"{source}_fallback" if source != "unknown" else "aired_fallback"