feat: Enhance avatar management with detailed logging and error handling

app/src/main/java/com/rosetta/messenger/database/RosettaDatabase.kt

@@ -13,10 +13,9 @@ import androidx.sqlite.db.SupportSQLiteDatabase
         MessageEntity::class,
         DialogEntity::class,
         BlacklistEntity::class,
-        AvatarCacheEntity::class,
-        AvatarDeliveryEntity::class
+        AvatarCacheEntity::class
     ],
-    version = 7,
+    version = 8,
     exportSchema = false
 )
 abstract class RosettaDatabase : RoomDatabase() {
@@ -58,16 +57,13 @@ abstract class RosettaDatabase : RoomDatabase() {
                     )
                 """)
                 database.execSQL("CREATE INDEX IF NOT EXISTS index_avatar_cache_public_key_timestamp ON avatar_cache (public_key, timestamp)")
-                
-                // Создаем таблицу для трекинга доставки аватаров
-                database.execSQL("""
-                    CREATE TABLE IF NOT EXISTS avatar_delivery (
-                        id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
-                        public_key TEXT NOT NULL,
-                        account TEXT NOT NULL
-                    )
-                """)
-                database.execSQL("CREATE UNIQUE INDEX IF NOT EXISTS index_avatar_delivery_public_key_account ON avatar_delivery (public_key, account)")
+            }
+        }
+        
+        private val MIGRATION_7_8 = object : Migration(7, 8) {
+            override fun migrate(database: SupportSQLiteDatabase) {
+                // Удаляем таблицу avatar_delivery (больше не нужна)
+                database.execSQL("DROP TABLE IF EXISTS avatar_delivery")
             }
         }
 
@@ -79,7 +75,7 @@ abstract class RosettaDatabase : RoomDatabase() {
                     "rosetta_secure.db"
                 )
                     .setJournalMode(JournalMode.WRITE_AHEAD_LOGGING) // WAL mode for performance
-                    .addMigrations(MIGRATION_4_5, MIGRATION_5_6, MIGRATION_6_7)
+                    .addMigrations(MIGRATION_4_5, MIGRATION_5_6, MIGRATION_6_7, MIGRATION_7_8)
                     .fallbackToDestructiveMigration() // Для разработки - только если миграция не найдена
                     .build()
                 INSTANCE = instance