fix(code-review): ignore stale running slots

[alex-alecu]

Summary

• Code review dispatch now stops old stuck running reviews from using owner slots forever.
• The existing retry path for stuck queued reviews stays the same, and stuck running reviews are not retried or changed by this fix.
• Added coverage for the slot count rules so recent work still counts and old stuck work does not.

Verification

1. In a local database, create an owner with recent running or queued reviews and confirm they still use slots.
2. Add a running review older than 90 minutes and confirm dispatch no longer counts it as using a slot.
3. Add a queued review older than 5 minutes and confirm dispatch still treats it as recoverable queued work, not active work.

Visual Changes

N/A

Reviewer Notes

Old stuck running reviews will still appear as running until a separate cleanup changes their saved state. This PR only restores dispatch capacity.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.ts
• apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.test.ts

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_{Reviewed by gpt-5.4-20260305 · 1,508,489 tokens}

[markijbema]

Wont this introduce the risk of people having unlimited number of endlessly running review agents? How do we know those reviews running for 90 minutes aren't actually consuming tokens?

[alex-alecu]

Wont this introduce the risk of people having unlimited number of endlessly running review agents? How do we know those reviews running for 90 minutes aren't actually consuming tokens?

@markijbema I will address this in a followup PR. As said in Slack I wanted a PR that solves the imediate pain with minimal code.