Implements the §14 Phase 3 review gate. requestReview() routes a building
job into the review stage (fencing any worker), carrying a normalized policy
(requiredApprovals + reviewer allowlist) and clearing prior decisions.
submitReview() records one decision per reviewer (last-write-wins, identity-
normalized), advances the job to testing once distinct approvals reach the
quorum, and treats any reject as a veto that returns the job to queued for
rework. Adds POST /fleet/jobs/:id/review/request and POST /fleet/jobs/:id/review,
a typed client, and a review-gate card on the job-detail page.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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