Give the UK qualify job 330 minutes

[MaxGhenis]

Fixes #659

The UK qualify job hits its 120-minute timeout on every attempt ("The job has exceeded the maximum execution time of 2h0m0s", run 39145419501). The catch-up then re-stages the attempt, so no candidate has finished its gates since 17 October around 14:30Z; 2.135.6 has been staged seven times.

Cause: before #651, every wrapper.household contract row errored at once (policyengine.uk was None), and the gates took 80–89 minutes. #651 made those rows run the household calculator, which takes the gates past two hours. Attempts with #651 but not #627 timed out too, so contract 2.0.0 isn't the cause. Projected total is about 135–145 minutes, per the independent review's log analysis. The cancelled log shows active computation up to the cut-off, not a hang.

Change: timeout-minutes: 330 on the qualify job, with a comment saying why. That's under the 360-minute ceiling for GitHub-hosted jobs. The job's concurrency group (uk-candidate-<pair>, cancel-in-progress: false) already stops later runs from cancelling it, and the replay job keeps its 355. No code or test changes. The workflow tests don't pin this value, and the YAML parses with qualify at 330.

Follow-ups (not here):

• UK staging lease (4 h) is shorter than the qualify job's 330-minute limit #662: the four-hour staging lease is now shorter than the 330-minute limit, so a run between about 240 and 330 minutes would be re-staged (churn, not a deadlock);
• speeding up the household contract route, for example by running household cases in parallel.

Independent review (Opus, in-session): VERDICT: AGREE. It confirmed the timeout annotation on 4 jobs, that all 15 qualify jobs since #651 were cancelled at about 2h00m20s, and that the ledger durations bear this out. The YAML is valid, the workflow tests pass 24/24, and concurrency and replay are unaffected.

🤖 Generated with Claude Code

[MaxGhenis]

Merged at 6588f78 (merge commit above). Audit:

• Independent review: in-session Opus, VERDICT AGREE at d4ae543. 6588f78 changes only the YAML comment, following that review's two notes: Check statutory resumption after a freeze: Budget reform contract 2.0.0 (cos d1344) #627 isn't part of the cause, and the four-hour staging lease, now tracked in UK staging lease (4 h) is shorter than the qualify job's 330-minute limit #662.
• Gates: gh pr checks exits 0 with all tests passing, MERGEABLE, no CHANGES_REQUESTED.
• Effect: the qualify job may run 330 minutes, so candidates finish their gates instead of being cancelled at 120 and re-staged.