On a maintainer's Mac the compatibility-database key is in the Keychain, so a
test that reached install reporting published fake reports. Every test module
now imports tests/sandbox.py first, which points app data at a throwaway
directory (new FRAME_CONTROL_DATA_DIR), turns telemetry off and sends the
database nowhere.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
