fix(vault): prevent collect timing race in pending cosigns

[blakebyrnes]

Summary

• prevent collect from using stale pending-cosign subscription updates
• apply pending-cosign updates atomically as a full snapshot
• keep collect due-date calculations aligned with the latest pending cosign state

Why

Out-of-order async subscription callbacks could finish late and overwrite newer pending-cosign data, which can leave collect timing stale.

Testing

• yarn vitest --run src-vue/test/MyVault.integration.test.ts

[Copilot]

Pull request overview

This PR addresses a race where out-of-order async pending-cosign subscription updates could overwrite newer state and leave collect timing calculations stale.

Changes:

• Switch pendingCosignUtxosById to store a full snapshot per UTXO (market value + optional due frame) and apply updates atomically with a sequence guard.
• Update collect due-date calculation to consider both uncollected revenue frames and the earliest pending cosign due frame.
• Update UI penalty/sum calculations to use the new marketValue field.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src-vue/screens-operations/vaulting-screen/Dashboard.vue	Adjust pending-cosign penalty aggregation to sum marketValue from the new map value type.
src-vue/overlays-operations/VaultCollectOverlay.vue	Adjust pending-cosign securitization/penalty sum to use marketValue.
src-vue/lib/MyVault.ts	Implement pending-cosign snapshot + out-of-order protection, add due-frame awareness to collect timing, and cache/sort revenue frames for due-date calculation.

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