fix(worker): revert ini reset, keep session fixes (#2139)
Revert the INI snapshot/restore mechanism from #2139 which caused
issues with frameworks that lazily set ini values like session.save_path
(#2185). Replace the session handler snapshot/restore with a simpler
direct session state reset from #2193, which preserves mod_user_names
across requests without requiring session module reload.
Co-Authored-By: Xavier Leune <xavier.leune@gmail.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
