- Filter the parent Maintenance Visit's docstatus (mv.docstatus != 2) via a qb join, as
the original SQL did, instead of the child Maintenance Visit Purpose row's docstatus.
Synced in normal flows, but exactly faithful to the original intent.
- Add a limit(500) to bound the read on a cancellation path.
Adds two both-engine tests calling on_cancel directly: an active (non-cancelled) visit
blocks the claim cancel; with no referencing visit the claim is marked Cancelled.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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