fix(android): add Hilt @Provides for SyncMetadataDao

SyncController constructor injection failed — SyncMetadataDao
existed on AppDatabase but had no per-DAO bridge in DatabaseModule
(no consumer until SyncController landed). Same fix as the earlier
CachedHomeIndexDao + CachedLikeDao + CachedMutationDao pattern.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/app/src/main/java/com/fabledsword/minstrel/cache/db/DatabaseModule.kt

@@ -12,6 +12,7 @@ import com.fabledsword.minstrel.cache.db.dao.CachedPlaylistDao
 import com.fabledsword.minstrel.cache.db.dao.CachedPlaylistTrackDao
 import com.fabledsword.minstrel.cache.db.dao.CachedResumeStateDao
 import com.fabledsword.minstrel.cache.db.dao.CachedTrackDao
+import com.fabledsword.minstrel.cache.db.dao.SyncMetadataDao
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
@@ -81,5 +82,9 @@ object DatabaseModule {
     fun provideCachedMutationDao(db: AppDatabase): CachedMutationDao =
         db.cachedMutationDao()
 
+    @Provides
+    @Singleton
+    fun provideSyncMetadataDao(db: AppDatabase): SyncMetadataDao = db.syncMetadataDao()
+
     private const val DATABASE_NAME = "minstrel.db"
 }