Drop size/mtime from the protected .fusion signature so heartbeat writes
to existing files (fusion.db-wal, settings.json, etc.) no longer trigger
false-positive leak failures when the post-test mutability probe happens
to land in a quiet window. New files still register; tests remain blocked
from writing to the real .fusion via the fs guards in vitest-setup.ts.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
79186c5e04