v4.44.36 - Checkbox / Bulk PAID-UNPAID Correction

- Baseline: v4.44.35 full ZIP supplied by user.
- Adds checkbox per row, select all, clear all, PAID/UNPAID status filter.
- Adds bulk PAID and bulk UNPAID with one mandatory reason.
- Each selected ID is reloaded and validated server-side.
- Existing single correction retained.
- pending/void cannot be forced through this workflow.
- Payroll reversal remains blocked while linked to an active KOPRA batch.
- Every successful row writes its own payment_status_correction_audit entry.
- No customer transaction payment reversal is introduced.
- No historical ledger rewrite.
