fix: seed FK flush order, DPS path resolution, admin_uploads Docker mount, docker-compose env additions

backend/seed.py

@@ -72,6 +72,9 @@ def seed_local_database():
         )
         session.add(student_user)
 
+        # Flush users first so FK constraints for subscription/transaction are satisfied
+        session.flush()
+
         # Seed Demo Student Subscription record
         demo_subscription = models.Subscription(
             id=uuid4(),
@@ -98,8 +101,8 @@ def seed_local_database():
         )
         session.add(demo_txn)
 
-        admin_id = uuid4()
-        
+
+        # admin_id is already defined above as the fixed UUID for the admin user
         jee_test_id = UUID("b6faa295-3bf5-4de2-a587-d72b889629c4")
         neet_test_id = UUID("e7c80521-825b-4c07-889a-ee646c05d762")
 
@@ -370,7 +373,12 @@ def seed_local_database():
 
         # --- DPS (Daily Practice Sheets) from admin_uploads JSON files ---
         print("Seeding DPS tests from admin_uploads...")
-        dps_json_dir = os.path.join(os.path.dirname(os.path.dirname(__file__)), "admin_uploads")
+        # Resolve path: works inside Docker (/app/admin_uploads) and locally (../../admin_uploads)
+        _script_dir = os.path.dirname(os.path.abspath(__file__))
+        _docker_path = os.path.join(_script_dir, "admin_uploads")
+        _local_path = os.path.join(_script_dir, "..", "admin_uploads")
+        dps_json_dir = _docker_path if os.path.isdir(_docker_path) else _local_path
+
         dps_json_files = sorted(glob.glob(os.path.join(dps_json_dir, "dps_*.json")))
 
         with Session(engine) as dps_session: