fix(modeline): drop per-render truename, guard vc fetch against signals

The VC modeline cache rebuilt its key every render, and the key included file-truename, so a stat ran on every redisplay rather than once per refresh as the comment claimed. Now it keys on (file show-remote). A moved symlink target is caught at the next TTL refresh, when vc-backend resolves the link fresh. And cj/modeline-vc-fetch is wrapped in condition-case returning nil, so a git signal on a slow or unmounted filesystem degrades to no-VC-info instead of breaking all redisplay.

0 files changed, 0 insertions, 0 deletions