fix: test database setup and scheduling test build error

- Add explicit verification loop in local-dev-2.sh to wait for crussell_test database to be ready before running tests (prevents race condition)
- Remove unused 'handler' variable declaration in scheduling_test.go that was breaking the build
- Tests now properly execute without immediate 'database does not exist' errors
- Real test failures are now visible instead of being masked by setup issues

backend/handlers/scheduling/scheduling_test.go

@@ -300,7 +300,7 @@ func TestScheduling_CreateExceptionalGroup_NonAdmin(t *testing.T) {
 	defer cleanup()
 
 	userToken := jwt.GenerateUserToken("user-123")
-	handler := http.HandlerFunc(CreateExceptionalGroup)
+
 
 	newGroup := ExceptionalGroup{
 		Name:        "Summer Hours",