fix(console): the workers-list lane helpers drop a re-read refused by a stopping gateway (#642)

[V3RON]

Closes #642

Status

Implement: done (repro red 8e565b6 -> green cf17fb2; fix commit 759ebe2) Review: round 2 passed (spec/code/claims F0) Hardware: n/a Gate: not run
Next: gate

Done when

• The lane's /v1/workers response helpers survive the gateway's listener stopping between interception and fetch — the carried repro (workers-gateway-stops-mid-fetch.spec.ts, adapted to call the real extracted helpers) is red at 8e565b6 with the lane's route.fetch: connect ECONNREFUSED signature and green from cf17fb2; the helpers drop that re-read with route.abort()
• A non-connect error from the re-read still fails the test (the narrow catch) — pinned: a rejection the regex does not match propagates out of the handler with no abort; probes: broadening the catch reddens the non-connect case, dropping it reddens the connect and repro cases; narrowing the regex to ECONNREFUSED reddens the ECONNRESET / socket-hang-up cases
• workers.spec.ts keeps passing with the helpers extracted, unchanged behavior — the two helpers moved to workers-answers.ts verbatim but for the fetchOrDrop guard; lane run green

Assumptions

• Assumption: the connect-level classes are ECONNREFUSED, ECONNRESET and socket hang up — the three the triage census observed (refused connect and destroyed mid-request); any other error still rethrows.

Review

Spec review: 0 blocking, 0 fixed, 0 notes. Code review: 2 blocking, 2 fixed, 0 notes. Claims review: 0 blocking, 0 fixed, 1 note.
Rounds: 2. Tokens: n/a.

Kind tests-only, so all three reviews ran; the code reviewer with lens: tests. Inputs from .agents/scripts/review-inputs.sh 667 (rules, ADRs and briefs from main). Round 1 reviewed cf17fb26; round 2 reviewed the fix 759ebe28 (code + claims, F0 both).

How the reviews were spawned: this session sits at subagent depth and the harness refused nested spawns, as on #643, #644, #646, #649, #650 and #661. Each reviewer ran as a fresh detached claude -p session — the body of .claude/agents/<reviewer>.md as its system prompt, its model from that file's frontmatter — reading only the inputs directory and its own worktree of the reviewed commit, with no PR body, commit messages or another reviewer's output; each read .agents/briefs/calibration.md first. Nothing was reviewed by the agent that wrote the code.

Written by an agent.

[V3RON]

Review notes

Not blocking, not verified. Each is one reviewer's claim.

• claims: e2e/console/workers-answers.ts:11 the why: says only connect-level errors are dropped and calls it "the refused connect"; the regex also drops ECONNRESET and socket hang up, which are mid-request resets, not connect failures

Written by an agent.