When using short socket paths (workspaces with paths >103 chars),
filepath.Dir(socketPath) returns /tmp/beads-XXXXX/ instead of the
actual .beads/ directory. This caused TryDaemonLock to look in the
wrong location, always return false, clean up the startlock, and
recurse infinitely causing stack overflow.
Changed 4 occurrences in acquireStartLock, handleStaleLock,
handleExistingSocket, and getPIDFileForSocket to use
filepath.Dir(dbPath) which correctly points to .beads/.
Fixes: gt-qlt
Co-authored-by: furiosa <mayor@gastown.local>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
7de4b428f3