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

tests/app/Services/SchoolYearManagementServiceCalendarTest.php

@@ -17,12 +17,10 @@ final class SchoolYearManagementServiceCalendarTest extends CIUnitTestCase
         $this->assertSame('2026-08-01', $calendar['registration_starts_on']);
         $this->assertSame('2026-10-05', $calendar['registration_ends_on']);
         $this->assertSame('2026-09-20', $calendar['first_day_of_school']);
-        $this->assertSame('2026-09-20', $calendar['1st_day_of_school']);
         $this->assertSame('2026-09-13', $calendar['fall_makeup_exam_on']);
         $this->assertSame('2026-09-06', $calendar['orientation_day']);
         $this->assertSame('2027-05-23', $calendar['final_exam_day']);
         $this->assertSame('2027-06-06', $calendar['last_day_of_school']);
-        $this->assertSame('2027-06-06', $calendar['last_school_day']);
         $this->assertSame('2027-01-17', $calendar['midterm_exam_day']);
         $this->assertSame('2027-01-24', $calendar['spring_semester_start']);
         $this->assertSame('2027-03-01', $calendar['installment_date']);