Initial commit — SyncFlow Android file sync app

Supports WebDAV, SFTP, SFTPGo, Nextcloud, ownCloud, Google Drive,
Dropbox, and OneDrive. Credentials encrypted with Android Keystore.
Biometric app-lock, conflict resolution, and auto-sync via WorkManager.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/main/kotlin/com/syncflow/data/db/SyncDatabase.kt

@@ -0,0 +1,26 @@
+package com.syncflow.data.db
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
+import com.syncflow.data.db.entities.*
+
+@Database(
+    entities = [
+        CloudAccountEntity::class,
+        SyncPairEntity::class,
+        SyncFileStateEntity::class,
+        SyncConflictEntity::class,
+        SyncEventEntity::class,
+    ],
+    version = 2,
+    exportSchema = true,
+)
+@TypeConverters(DbConverters::class)
+abstract class SyncDatabase : RoomDatabase() {
+    abstract fun cloudAccountDao(): CloudAccountDao
+    abstract fun syncPairDao(): SyncPairDao
+    abstract fun syncFileStateDao(): SyncFileStateDao
+    abstract fun syncConflictDao(): SyncConflictDao
+    abstract fun syncEventDao(): SyncEventDao
+}