Fix local dev config and ALOTTTT OFF FLUTTER, im tired boss..

walkguide-mobile/walkguide_app/lib/features/walk_guide/domain/entities/walk_session.dart

@@ -0,0 +1,13 @@
+class WalkSession {
+  final String sessionId;
+  final DateTime startedAt;
+  final DateTime? stoppedAt;
+  final int obstacleCount;
+
+  const WalkSession({
+    required this.sessionId,
+    required this.startedAt,
+    this.stoppedAt,
+    this.obstacleCount = 0,
+  });
+}

walkguide-mobile/walkguide_app/lib/features/walk_guide/domain/repositories/walk_guide_repository.dart

@@ -0,0 +1,9 @@
+import 'package:dartz/dartz.dart';
+
+import '../../../../core/errors/failures.dart';
+
+abstract class WalkGuideRepository {
+  Future<Either<Failure, void>> startSession();
+  Future<Either<Failure, void>> stopSession();
+  Future<Either<Failure, void>> logObstacle(Map<String, dynamic> payload);
+}