fix: 使 TMDbProvider 支持从数据库读取 API Key

- 修改 TMDbProvider 添加 apiConfig *APIConfigService 字段
- NewTMDbProvider 接受 apiConfig 参数（可为 nil）
- 添加 resolveAPIKey(ctx) 方法：优先从 config 读取，回退到数据库
- 添加 resolveBaseURL(ctx) 方法：解析基础 URL
- 修改 SearchMovie 使用 resolveAPIKey / resolveBaseURL
- 修改 DiscoverService.Fetch 使用 resolveAPIKey / resolveBaseURL
- 调整 service.go 初始化顺序，确保 tmdb 在 scraper 之前初始化
- 构建验证通过

internal/service/service.go

@@ -81,7 +81,9 @@ func New(cfg *config.Config, log *zap.Logger, repos *repository.Container) *Cont
 	go sseHub.Run()
 
 	probe := NewFFprobeService(cfg, log)
-	tmdb := NewTMDbProvider(cfg, log)
+	crypto := NewCryptoService(cfg.Secrets.JWTSecret, log)
+	apiConfig := NewAPIConfigService(log, repos, crypto)
+	tmdb := NewTMDbProvider(cfg, log, apiConfig)
 	bangumi := NewBangumiProvider(cfg, log)
 	thetvdb := NewTheTVDBProvider(cfg, log)
 	fanart := NewFanartProvider(cfg, log)
@@ -94,8 +96,6 @@ func New(cfg *config.Config, log *zap.Logger, repos *repository.Container) *Cont
 	watcher := NewWatcherService(log, repos, scanner)
 	nfo := NewNFOService(log, repos)
 	ai := NewAIService(cfg, log)
-	crypto := NewCryptoService(cfg.Secrets.JWTSecret, log)
-	apiConfig := NewAPIConfigService(log, repos, crypto)
 	duplicate := NewDuplicateService(log, repos, hub)
 	filemanager := NewFileManagerService(cfg, log, repos)
 	dlna := NewDLNAService(log)