Short tests were timing out after 13+ minutes due to:
1. TestZFCSkipsExportAfterImport spawning subprocess that tried to
auto-start daemon - now skipped in short mode
2. TestVersionFlag taking 5+ seconds because --version flag did not
skip PersistentPreRun daemon startup - added early return
3. TestGetVersionsSince* had hardcoded version expectations that
became stale - made tests dynamic using versionChanges array
Short tests now complete in ~8 seconds instead of timing out.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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