feat: Add international release date fallback for movies without US dates

- Add fallback logic to use any available country when US release dates unavailable
- Maintains same release type priority (Digital, Physical, Theatrical)
- Should resolve The Fabric of Christmas (2023) no_valid_date_source issue
- Logs which country is used as fallback for transparency
- Available countries for this movie: AU, BE, CA

clients/external_clients.py

@@ -235,6 +235,42 @@ class TMDBClient:
                         return parsed_date
         
         _log("WARNING", f"❌ TMDB: No release dates found for {imdb_id} in {self.primary_country}")
+        
+        # Fallback: Try any available country if primary country has no dates
+        _log("INFO", f"🌍 TMDB: Trying fallback to any available country for {imdb_id}")
+        for entry in release_dates.get("results", []):
+            country = entry.get("iso_3166_1", "").upper()
+            _log("INFO", f"🎯 TMDB: Checking fallback country {country}")
+            
+            releases = entry.get("release_dates", [])
+            if not releases:
+                continue
+            
+            # Collect all available releases with their types and dates
+            available_releases = []
+            for release in releases:
+                release_type = release.get("type")
+                release_date = release.get("release_date")
+                
+                if release_date:
+                    parsed_date = _parse_date_to_iso(release_date)
+                    if parsed_date:
+                        available_releases.append((release_type, parsed_date))
+            
+            # Apply TMDB release type priority order
+            tmdb_priority = self._get_tmdb_type_priority()
+            for preferred_type in tmdb_priority:
+                for release_type, parsed_date in available_releases:
+                    if release_type == preferred_type:
+                        release_type_names = {
+                            1: "Premiere", 2: "Limited Theatrical", 3: "Theatrical", 
+                            4: "Digital", 5: "Physical", 6: "TV Premiere"
+                        }
+                        type_name = release_type_names.get(release_type, f"Type {release_type}")
+                        _log("INFO", f"✅ TMDB: Using fallback {country} {type_name} release date: {parsed_date}")
+                        return parsed_date
+        
+        _log("WARNING", f"❌ TMDB: No release dates found for {imdb_id} in any country")
         return None
     
     def _get_tmdb_type_priority(self) -> List[int]: