Fix semester context, attendance rosters, and billing workflows

- load global semester helpers consistently and use date-based semester defaults
- fix grading and daily attendance duplicate student/section rows
- keep attendance violations scoped to the current semester by default
- update invoice, refund, discount, payment, and financial aid flows
- add configuration cleanup migrations for duplicate calendar/semester keys
- refresh parent registration/report-card and print request handling
- update related models, services, views, cron notes, and test coverage

app/Controllers/View/MidtermController.php

@@ -36,7 +36,7 @@ class MidtermController extends BaseController
         $this->teacherClassModel = new TeacherClassModel();
         $this->semesterScoreService = service('semesterScoreService');
         $this->schoolYear = $this->configModel->getConfig('school_year');
-        $this->semester = $this->configModel->getConfig('semester');
+        $this->semester = getSemester();
         $this->gradingLockModel = new GradingLockModel();
         $this->missingScoreOverrideModel = new MissingScoreOverrideModel();
     }