refactor: update data types and streamline ID handling

- Changed the data type of 'kitsu_id' in the anime_mapping_cache table from TEXT to INTEGER for better consistency.
- Simplified the handling of 'kitsu_id' in the MetadataScraper and AnimeMapper classes by removing unnecessary string conversions.

comet/core/database.py

@@ -344,7 +344,7 @@ async def setup_database():
         await database.execute(
             """
                 CREATE TABLE IF NOT EXISTS anime_mapping_cache (
-                    kitsu_id TEXT PRIMARY KEY,
+                    kitsu_id INTEGER PRIMARY KEY,
                     imdb_id TEXT,
                     is_anime BOOLEAN,
                     updated_at INTEGER

comet/metadata/manager.py

@@ -185,7 +185,7 @@ class MetadataScraper:
             # Check if this IMDB ID has a Kitsu equivalent for additional aliases
             kitsu_id = anime_mapper.get_kitsu_from_imdb(media_id)
             if kitsu_id:
-                kitsu_aliases = await get_kitsu_aliases(self.session, str(kitsu_id))
+                kitsu_aliases = await get_kitsu_aliases(self.session, kitsu_id)
 
         # Combine the aliases from both sources
         return self.combine_aliases(kitsu_aliases, trakt_aliases)

comet/services/anime.py

@@ -170,9 +170,8 @@ class AnimeMapper:
             imdb_id = self._entry_value(entry, "imdb_id")
 
             if kitsu_id and imdb_id:
-                kitsu_id_str = str(kitsu_id)
-                self.kitsu_to_imdb[kitsu_id_str] = imdb_id
-                self.imdb_to_kitsu[imdb_id] = kitsu_id_str
+                self.kitsu_to_imdb[kitsu_id] = imdb_id
+                self.imdb_to_kitsu[imdb_id] = kitsu_id
                 self.anime_imdb_ids.add(imdb_id)
 
         self.loaded = True
@@ -187,7 +186,7 @@ class AnimeMapper:
 
             params.append(
                 {
-                    "kitsu_id": str(kitsu_id),
+                    "kitsu_id": kitsu_id,
                     "imdb_id": self._entry_value(entry, "imdb_id"),
                     "is_anime": True,
                     "updated_at": timestamp,