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/AdminProgressController.php

@@ -451,7 +451,7 @@ class AdminProgressController extends BaseController
             $schoolYear = $this->currentSchoolYearName((string) ($this->configModel->getConfig('school_year') ?? ''));
         }
 
-        $semester = (string) ($this->configModel->getConfig('semester') ?? '');
+        $semester = (string) (getSemester() ?? '');
         $schoolYearForRange = $schoolYear !== '' ? $schoolYear : $this->currentSchoolYearName((string) ($this->configModel->getConfig('school_year') ?? ''));
         [$rangeStart, $rangeEnd] = $this->semesterRangeService->getSchoolYearRange($schoolYearForRange);
         $semesterNorm = $this->semesterRangeService->normalizeSemester($semester);