chore(agents): review converges: a claims review, two code-review lenses, later rounds review only the fix

[V3RON]

Second of three. Review rounds kept finding new things: in #383 and #386, about half of the findings in round 2 and later came from the previous fix, and most were stale comments or docs outside the diff.

• .agents/scripts/stale-refs.sh: lists every line in the repo that still names a moved or deleted path, a declaration that is gone, or a quoted string no code file has. Git only; about 2 s. On refactor(leasing): leasing is its own module, entered through src/leasing/index.ts #383 before its round-4 fix it finds the src/gateway/queue.ts header naming src/core/wait-queue.ts, one of that round's three findings. review-inputs.sh adds its output, plus commit and fix.patch.
• Claims review: a new claims-reviewer agent checks that every comment, doc line, test title and message the diff touches or the sweep finds is true of the code. It runs every round. Its findings never park a PR or count toward the round cap; their fixes get at most two claims-only rounds.
• Wider round 1: the code review runs as two reviewers: behaviour (including other code acting on the same state) and tests and rules (up to six probes). Each lists what it checked. Briefs say there is no limit on findings.
• Later rounds review only the fix: is each earlier finding resolved, does the fix diff add a defect, is another instance of the same class left. Anything else is a note; a confirmed defect there becomes a bug:new issue.
• Every finding names its class: the general rule it breaks. In fix mode the implementer finds and fixes every instance of the class and reports them under Variants:. The audit now runs the sweep.
• Spec review flags "delivered differently" (from Matt Pocock's code-review): a spec line the diff delivers in another way than written, like refactor(leasing): leasing is its own module, entered through src/leasing/index.ts #383 calling core.connect inside createLeasing when the spec put it in the daemon.
• delivery.md rule 14, deliver, DELIVERY.md, and delivery-stats.mjs (a Claims review column and claims: tag) follow.

Tests: src/stale-refs.test.ts (4 tests; each fails when the part it covers is broken), src/delivery-stats.test.ts extended.

Written by an agent.