Close startup log connection and use portable export filenames

mobile/lib/services/immich_logger.service.dart

@@ -24,7 +24,8 @@ abstract final class ImmichLogger {
     try {
       return await LogService.I.getMessages();
     } on LoggerUnInitializedException {
-      final logs = DriftLogger.sqlite(await openSqliteConnection(name: 'immich_logs'));
+      final connection = await openSqliteConnection(name: 'immich_logs');
+      final logs = DriftLogger.sqlite(connection);
       try {
         return [
           // if the log service had started, main would have logged this already
@@ -34,6 +35,7 @@ abstract final class ImmichLogger {
         ];
       } finally {
         await logs.close();
+        await connection.close();
       }
     }
   }
@@ -41,7 +43,8 @@ abstract final class ImmichLogger {
   static Future<void> shareLogs(BuildContext context, {String? startupError}) async {
     final tempDir = await getTemporaryDirectory();
     final dateTime = DateTime.now().toIso8601String();
-    final filePath = '${tempDir.path}/Immich_log_$dateTime.log';
+    final safeTimestamp = dateTime.replaceAll(':', '-');
+    final filePath = '${tempDir.path}/Immich_log_$safeTimestamp.log';
     final logFile = await File(filePath).create();
     final io = logFile.openWrite();
     try {

mobile/test/services/immich_logger.service_test.dart

@@ -28,7 +28,8 @@ void main() {
     await tester.pumpWidget(const SizedBox());
 
     await tester.runAsync(() async {
-      final logs = DriftLogger.sqlite(await openSqliteConnection(name: 'immich_logs'));
+      final connection = await openSqliteConnection(name: 'immich_logs');
+      final logs = DriftLogger.sqlite(connection);
       await LogRepository(logs).insertAll([
         LogMessage(
           message: 'Failed to connect to old.example.net/203.0.113.9:443, uri=https://old.example.net/api',
@@ -37,6 +38,7 @@ void main() {
         ),
       ]);
       await logs.close();
+      await connection.close();
 
       await ImmichLogger.shareLogs(
         tester.element(find.byType(SizedBox)),