test(grok): format web executor suite (#12412)

Applies the repository Prettier style to tests/unit/grok-web.test.ts. No production code, no assertion changes.

The AST-identical claim was verified independently rather than taken on trust: minifying both sides through esbuild produces byte-identical output.

The reformat expands the file from 2436 to 2713 lines, past its 2437 cap, so the baseline carries a new annotated entry at 2985 — the real LOC plus ~10% headroom, per the operator's instruction, so routine additions to this suite do not re-trip the gate on formatting alone. It is recorded as a deliberate exception to the down-only ratchet #12411 re-tightened; no other entry moves.

Verified: 68/68 in the reformatted suite, check-file-size OK.