Addresses Copilot's review on #2152. The client stand-in was
`({ tag }) as unknown as InspectorClient` — a double cast with no
justification, which AGENTS.md rejects.
`Object.create(InspectorClient.prototype)` gives a real prototype chain
without running the constructor, so it needs only a single cast and still
drags in no transport or environment. The tag went with it: every
assertion compares identity, and `Object.create` already returns a
distinct object per call.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MZdpUwhHf943FoprcLVzEm
Signed-off-by: cliffhall <cliff@futurescale.com>
dc026acfea