fix(api): add TMDB ID enrichment for KP content via IMDB ID lookup

- Add TMDBID field to ExternalIDs model
- Enhance GetExternalIDs in MovieService and TVService to fetch TMDB ID via FindTMDBIdByIMDB
- Add EnrichKPWithTMDBID function to enrich unified content with TMDB IDs
- Update unified handlers to automatically enrich KP content with TMDB IDs
- Enrich search results with TMDB IDs by fetching full film data for each result

This ensures that when using source=kp, the response includes TMDB IDs in externalIds
when available through IMDB ID mapping, while preserving all original KP data.

pkg/services/tv.go

@@ -86,5 +86,34 @@ func (s *TVService) GetSimilar(id, page int, language string) (*models.TMDBTVRes
 }
 
 func (s *TVService) GetExternalIDs(id int) (*models.ExternalIDs, error) {
-	return s.tmdb.GetTVExternalIDs(id)
+	if s.kpService != nil {
+		kpFilm, err := s.kpService.GetFilmByKinopoiskId(id)
+		if err == nil && kpFilm != nil {
+			externalIDs := MapKPExternalIDsToTMDB(kpFilm)
+			externalIDs.ID = id
+			
+			// Пытаемся получить TMDB ID через IMDB ID
+			if kpFilm.ImdbId != "" && s.tmdb != nil {
+				if tmdbID, tmdbErr := s.tmdb.FindTMDBIdByIMDB(kpFilm.ImdbId, "tv", "ru-RU"); tmdbErr == nil {
+					externalIDs.TMDBID = tmdbID
+				}
+			}
+			
+			return externalIDs, nil
+		}
+	}
+	
+	tmdbIDs, err := s.tmdb.GetTVExternalIDs(id)
+	if err != nil {
+		return nil, err
+	}
+	
+	if s.kpService != nil && tmdbIDs.IMDbID != "" {
+		kpFilm, err := s.kpService.GetFilmByImdbId(tmdbIDs.IMDbID)
+		if err == nil && kpFilm != nil {
+			tmdbIDs.KinopoiskID = kpFilm.KinopoiskId
+		}
+	}
+	
+	return tmdbIDs, nil
 }