QA INTEGRASI PERIODIC PRODUKSI (OFFLINE)
=====================================
Source: STINV 2.10.241 production guarded build
PHP lint: 423 files, 0 syntax error
Offline unit tests: 2 PASS
VERSION.txt: 2.10.241 unchanged
Changelog: unchanged
Changed/added paths:
 - README_PERIODIC_PRODUKSI_INTEGRASI_FINAL.txt
 - detil_pembelian_form.php
 - includes/approved_corrections.php
 - includes/returns.php
 - modules/periodic/engine.php
 - penjualan_form.php
 - tests/periodic_engine_math_test.php
 - tool_audit_periodic_produksi.php

NOT TESTED: MariaDB transaction, approval/returns/corrections end-to-end, external production database, SQL+PVE restore.
Legacy Moving Average writes remain a compatibility shadow. Official HPP is from PVE only, and stale PVE must block reporting.
