Final code review of Phase 1 flagged that the three flag-mutating
tests leaked static state across test boundaries. Wrap each in
try/finally that snapshots IndoorAll on entry and restores it on
exit, matching the PhysicsDiagnosticsTests pattern at line 30-49.
Tests now safe under parallel test runs + future additions.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Covers the master IndoorAll cascade (both directions) and the IsEnvCellId
helper's 0x0100 boundary check across outdoor cells, indoor cells, and
landblock-prefixed forms.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>