feat: add Verifikasi IPK bulk check and fix menu (ENH-011)

[ffooll-bit]

Summary

Adds a dedicated Verifikasi IPK menu (/verifikasi-ipk) to bulk-check and correct last-semester IPK values against an Excel file (records ENH-011, issue #115).

• Upload an Excel (columns nim + ipk); the app compares each student's Excel IPK against their last active semester's IPK in Neo Feeder (getAktivitasKuliahMahasiswa, largest id_semester, a_periode_aktif=1).
• Table shows NIM / name / Neo IPK / Excel IPK / semester / cocok-beda; a checkbox appears only for rows with a live active last semester.
• Checked rows push the Excel IPK via UpdatePerkuliahanMahasiswa using a full record (the whole active last-semester row + id_pembiayaan resolved via GetListRiwayatPendidikanMahasiswa, with ipk overridden) - Neo Feeder rejects partial records, which is why the earlier attempt reported failures.
• Per-row results (success/failure with the Neo Feeder error message) are shown on a summary page (results), mirroring the graduation guidance page.
• Uses a separate cache store + resume cookie so it never clobbers the graduation WizardProgress.

Non-mutating Playwright verification + a single-NIM live apply test (full restore) confirmed the flow; local CI green (php -l, php-cs-fixer, phpunit 36/36).

Checklist

• Implementation on a branch from main with a single atomic conventional commit
• Local CI: php -l, php-cs-fixer, phpunit all green
• Live verification (non-mutating paths + one approved apply on a single NIM, restored)

Notes

• In-scope files only; ARCHITECTURE.md / STRUCTURE.md intentionally left unstaged.
• apply() uses set_time_limit(0) for large batches (same ceiling as graduation finish()).

Fixes #115