Improvement: `ov doctor` should distinguish 'not yet created' from 'missing/broken' for DBs

[jayminwest]

Source

Decomposed from #84 (Chapter 5).

Summary

ov doctor reports database files (mail.db, sessions.db, etc.) as failures when they don't exist yet. These files are created on first use (e.g., when the coordinator starts), so their absence is a "pending" state, not a failure.

Suggestion

Add a "pending" or "not yet created" status distinct from "missing/broken":

✓ mail.db        — will be created on first use
✗ metrics.db     — exists but corrupt (actual failure)

Related

• Narrative: User Experience Report #84 (parent narrative)