fix: Stop touching season.nfo/tvshow.nfo and debug missing NFO metadata

Changes:
- Disabled creation/updating of season.nfo and tvshow.nfo files
  NFOGuard should only manage episode NFO files, not series-level files

- Added debugging output to track aired/dateadded values in NFO updates
  The example NFO was missing these crucial fields despite processing
  Debug logs will show if data is being passed correctly to update function

This ensures NFOGuard only manages episode-level metadata files and
helps identify why some NFO files are missing the dateadded/aired fields.

core/nfo_manager.py

@@ -988,13 +988,20 @@ class NFOManager:
             episode_elem.text = str(episode_num)
             
             # Dates at the end
+            print(f"🔍 NFO Update Debug - aired: '{aired}', dateadded: '{dateadded}'")
             if aired:
                 aired_elem = ET.SubElement(episode, "aired")
                 aired_elem.text = aired[:10] if len(aired) >= 10 else aired
+                print(f"✅ Added aired field: {aired}")
+            else:
+                print(f"⚠️ No aired date provided")
             
             if dateadded:
                 dateadded_elem = ET.SubElement(episode, "dateadded")
                 dateadded_elem.text = dateadded
+                print(f"✅ Added dateadded field: {dateadded}")
+            else:
+                print(f"⚠️ No dateadded provided")
             
             # Add NFOGuard comment at the bottom with other NFOGuard fields
             nfoguard_comment = ET.Comment(f" Updated by {self.manager_brand} - Source: {source} ")