[vitormattos]

Problem

PR #9343 only updates the Bats GitHub Action, yet MySQL, PostgreSQL, MariaDB, and SQLite PHPUnit workflows fail on two integration tests. Both failures persist on a rerun of the failed jobs.

LibreSign's API/integration test base temporarily replaces global IAppConfig with the in-memory AppConfigOverwrite. The Nextcloud container may retain an app-scoped PolicySource constructed with that replacement, causing later integration tests that expect real database persistence to load defaults or miss writes. Related test contamination was documented on #9238/#9242.

Changes

• Isolate the migration's real-AppConfig load/save contract in a separate PHPUnit process.
• Isolate the explicit-default persistence and rule-count contract in a separate PHPUnit process.
• Disable PHPUnit global-state preservation to prevent inherited test overrides or cached services.
• Preserve the existing assertions for database persistence and counts. No production, Bats, or dependency changes.

Validation

• Re-ran the failed jobs on chore(deps): Bump bats-core/bats-action from 4.0.0 to 4.1.0 #9343: the same two integration failures reproduced on MySQL and SQLite.
• PHPUnit is green on this PR in every configured matrix: MySQL (PHP 8.3, 8.4, 8.5), MariaDB 10.6/11.4 (PHP 8.5), PostgreSQL (PHP 8.5), and SQLite (PHP 8.5). Both previously failing tests are exercised with their original database assertions.
• Static analysis, Playwright, Node tests, PHP-CS-Fixer, all lint workflows, OpenAPI, and REUSE passed.
• Behat MySQL, PostgreSQL, MariaDB, and SQLite remain in progress; no claim of full green CI until they complete.
• Commit bee9aaf was verified GPG-signed and DCO-compliant.

Related: #9343, #9238, #9242.