[mob] Add migration for filedata

mobile/lib/db/ml/db.dart

@@ -46,6 +46,7 @@ class MLDataDB {
     createNotPersonFeedbackTable,
     fcClusterIDIndex,
     createClipEmbeddingsTable,
+    createFileDataTable,
   ];
 
   // only have a single app-wide reference to the database
@@ -237,6 +238,7 @@ class MLDataDB {
     await db.execute(deleteClusterSummaryTable);
     await db.execute(deleteNotPersonFeedbackTable);
     await db.execute(deleteClipEmbeddingsTable);
+    await db.execute(deleteFileDataTable);
   }
 
   Future<Iterable<Uint8List>> getFaceEmbeddingsForCluster(

mobile/lib/db/ml/db_fields.dart

@@ -106,3 +106,16 @@ CREATE TABLE IF NOT EXISTS $clipTable (
 ''';
 
 const deleteClipEmbeddingsTable = 'DELETE FROM $clipTable';
+
+const fileDataTable = 'filedata';
+const createFileDataTable = '''
+CREATE TABLE IF NOT EXISTS $fileDataTable ( 
+  $fileIDColumn INTEGER NOT NULL,
+  type TEXT NOT NULL,
+  size INTEGER NOT NULL,
+  updated_at INTEGER NOT NULL,
+  PRIMARY KEY ($fileIDColumn, type)
+  );
+''';
+
+const deleteFileDataTable = 'DELETE FROM $fileDataTable';