test(engine): the unwired-parameter guard has been red on main — its list is stale by one (#3033)

## The unwired-parameter guard has been red on `main`

```
A parameter LEAVING this list is the goal; one arriving is a regression — update the list only to shorten it.
  expected [ …(16) ] to deeply equal [ …(17) ]
```

Reproduced on clean `origin/main`, so it is not a branch artifact.

`packages/engine/src/scheduler.ts isWipColumn` is **supplied at both
production call sites now** — `self-healing.ts:4754` and `:5825` pass
`isWipColumn: completedWipColumns.has(blocker.column)` and the
blocked-lane equivalent, wired by #2975/#2987. The list was not
shortened in the same change.

So this is the good direction: a parameter got wired. The assertion just
was not told.

## Shortened, not re-recorded

I diffed the computed set against the recorded one rather than
regenerating:

```
DEPARTED (wired since):  packages/engine/src/scheduler.ts isWipColumn
ARRIVED (new):           (none)
```

Exactly one departure, nothing arrived — so removing that single line is
the whole fix, and it follows the file's own instruction (*"update the
list only to shorten it"*). Re-recording wholesale would have silently
absorbed any arrival too, which is the one thing this ratchet must not
do.

## How it was found

While measuring an unrelated change to the sibling census. **This suite
is outside the merge gate**, which is why a red assertion sat unnoticed
— the same reason #2969's 15 red agent-action tests survived, and worth
noting as a pattern rather than a one-off.

## What I abandoned to get here, and why it belongs in this PR's story

I was trying to remove two false positives from the sibling
`check-lane-wiring` census — `bucketForTask(task: TaskItem)` and
`otherBucketSecondaryLabel(task: TaskItem)`, both flagged only because
`TaskItem` declares `columnFlags?`, both reading it off the entity
internally.

The rule I tried was the sibling guard's own documented one: a
**required** parameter is enforced by the compiler, so it is not this
census's question. It measured perfectly — 15 sites → 13, removing
exactly those two and retaining every genuine entry.

Then it failed `lane-wiring-census-named-types.test.ts`:

```ts
export type MergeContext = { completeColumns?: ReadonlySet<string> };
export function canMerge(task: string, context: MergeContext): string { … }
```

A **required** parameter with a named options type is a shape that
census deliberately covers — `canMerge(task, {})` really can omit the
lane member. My "exact" rule was exact only against the current tree,
and it broke a tested contract. I dropped it rather than edit their test
to match my change.

The two false positives therefore stay baselined, and the cost stands as
previously recorded: a genuinely new unwired call in those two TUI files
would be masked. I do not have a rule I can prove safe, and three
attempts at this class have now traded false positives for worse false
negatives.

## Verification (measured)

- both guard suites — **18 passed / 0 failed** (was 1 failed)
- `check-lane-wiring`, `lifecycle-column-census --strict`,
`check-fnxc-future-dates` — green
- `eslint` — clean (one pre-existing warning, no errors)

Test-only; no product file touched. No changeset.

packages/engine/src/__tests__/unwired-lane-parameter-guard.test.ts

@@ -80,6 +80,18 @@ file + parameter rather than line so an unrelated edit above them does not manuf
 Wiring them is not this change's job — they span core, engine and dashboard, i.e. three other
 batches — and pretending they did not exist for another week is worse than listing them.
 */
+/*
+FNXC:WorkflowLifecycleColumns 2026-07-31-17:05:
+`scheduler.ts isWipColumn` LEFT this list, which is the direction it is supposed to move.
+
+It is supplied at both production call sites now — `self-healing.ts:4754` and `:5825` pass
+`isWipColumn: completedWipColumns.has(blocker.column)` and the blocked-lane equivalent, wired by
+#2975/#2987. The list was not shortened in the same change, so this assertion has been RED on `main`
+since: 16 found against 17 allowed.
+
+Removed rather than re-recorded wholesale, per this file's own instruction two paragraphs down —
+"update the list only to shorten it". Nothing arrived; the delta is exactly this one departure.
+*/
 const KNOWN_UNWIRED = [
   "packages/core/src/blocker-fanout.ts escalationColumns",
   "packages/core/src/blocker-fanout.ts holdColumn",
@@ -96,7 +108,6 @@ const KNOWN_UNWIRED = [
   "packages/dashboard/app/utils/taskActivity.ts columnFlags",
   "packages/dashboard/app/utils/taskTiming.ts columnFlags",
   "packages/engine/src/runtimes/in-process-runtime.ts terminalColumns",
-  "packages/engine/src/scheduler.ts isWipColumn",
   "packages/engine/src/scheduler.ts satisfactionColumnsByTaskId",
 ].sort();