Add Jellyfin mappings and optimize cast queries

Performance and settings updates:

- Add a new jellyfin_library_mappings column to the settings table and wire it into the Settings model (update handling and default value). This enables storing Jellyfin library mappings in settings.
- Optimize Cast::list by loading all cast filmography in a single joined query and grouping results per cast to avoid N+1 queries.
- Remove per-item cast/staff loading in Media model to avoid repeated queries during list/search operations.
- Remove game-specific enrichment from MediaController search to stop extra game info lookups during search responses.

These changes reduce repeated DB calls and centralize Jellyfin mapping storage.

api/models/Cast.php

@@ -49,16 +49,37 @@ class Cast extends BaseModel {
         $items = $this->findAll($conditions, 'createdAt DESC', $limit, $offset);
         $total = $this->count($conditions);
 
-
-        // Add filmography to each cast member
-        foreach ($items as &$item) {
-            $item['filmography'] = $this->getMediaForCast($item['id']);
-            // Extract unique media types
-            $mediaTypes = array_unique(array_column($item['filmography'], 'category'));
-            $item['media_types'] = array_values($mediaTypes);
+        // Load filmography for all cast members in a single query
+        if (!empty($items)) {
+            $castIds = array_column($items, 'id');
+            $placeholders = str_repeat('?,', count($castIds) - 1) . '?';
+            
+            $stmt = $this->pdo->prepare("
+                SELECT mc.cast_id, m.id, m.title, m.year, m.poster, m.category, m.type, mc.role, mc.characterName
+                FROM media m
+                INNER JOIN media_cast mc ON m.id = mc.media_id
+                WHERE mc.cast_id IN ($placeholders)
+                ORDER BY m.year DESC
+            ");
+            $stmt->execute($castIds);
+            $allFilmography = $stmt->fetchAll();
+            
+            // Group filmography by cast_id
+            $filmographyByCast = [];
+            foreach ($allFilmography as $film) {
+                $castId = $film['cast_id'];
+                unset($film['cast_id']);
+                $filmographyByCast[$castId][] = $film;
+            }
+            
+            // Attach filmography to each cast member
+            foreach ($items as &$item) {
+                $item['filmography'] = $filmographyByCast[$item['id']] ?? [];
+                $mediaTypes = array_unique(array_column($item['filmography'], 'category'));
+                $item['media_types'] = array_values($mediaTypes);
+            }
         }
 
-        
         return [
             'items' => $items,
             'total' => $total,