ci(verify-install): script still probes removed 'af' bin; missed in #847 cleanup; also never covered 'afx'

[amrmelsayed]

Symptom

`Tests` workflow has been red on `main` since PR #847 merged (2026-05-24 19:44 UTC). Run 26370977768:

```
Package Install Verification › Verify install from tarball
OK: codev --help
FAIL: af --help (exit code 127)
OK: porch --help
OK: consult --help
Install verification FAILED.
```

Exit 127 = command not found. Expected — PR #847 deliberately removed the `af` bin entry from `packages/codev/package.json`.

Root cause

`packages/codev/scripts/verify-install.mjs:35`:

```js
const bins = ['codev', 'af', 'porch', 'consult'];
```

This list wasn't updated alongside the bin-map removal in PR #847. The PR's iter-2 did update `packages/codev/src/tests/cli/install.e2e.test.ts` to assert `AF_BIN` does NOT exist, but the CI-side post-install check in `scripts/verify-install.mjs` was missed.

Second defect (pre-existing, surfaces now)

The same array never included `afx` — the canonical, supported agent-farm entrypoint. So verify-install has never actually proved that `afx` installs from the tarball; it was proving the deprecated `af` alias instead. PR #847 makes this visible because `af` is gone but `afx` is the thing that should be checked.

Fix

Replace `'af'` with `'afx'` in `packages/codev/scripts/verify-install.mjs:35`:

```diff

• const bins = ['codev', 'af', 'porch', 'consult'];

• const bins = ['codev', 'afx', 'porch', 'consult'];
  ```

One-line change. No other callers reference this script's bin list.

Acceptance criteria

• `packages/codev/scripts/verify-install.mjs` probes `afx` instead of `af`.
• `Tests` workflow on `main` green for two consecutive runs (PR-merge-triggered).
• No other workflow or script still references the removed `af` bin (`grep -rn "'af'" .github/ packages/codev/scripts/` clean).

Out of scope

• Re-adding `af` as a bin — [Issue #846] Remove codev-wrapped agent-farm invocations #847 deliberately removed it; this issue is just the CI-script catch-up.

[waleedkadous]

On it! Working on a fix now.