Plan: Add // smoke comment to runner entry point

Context

This is a smoke-test run dispatched by the agent run system (kind=plan, approvalRequired=true). The goal is to exercise the plan → approval → apply pipeline end-to-end with a trivial, low-risk edit. The change itself is purely cosmetic and has no functional impact; it serves only to confirm that the runner can author a plan, surface it for approval, and then make a minimal modification to a real source file.

Change

Add a single line // smoke as the very first line of services/runner/src/index.ts, above the existing JSDoc block comment that begins on line 1.

Resulting file head

// smoke
/**
 * Runner daemon entry point.
 *
 * - Subscribes to Postgres NOTIFY('agent_run_queued')
 * ...

Files to modify

• services/runner/src/index.ts — prepend one line.

Rationale for placement

"At the top" is interpreted literally as line 1, before the existing JSDoc header. This keeps the marker easy to spot and easy to revert, and avoids touching the docstring's content.

Verification

• pnpm typecheck — must still pass; a leading line comment cannot affect TypeScript compilation.
• Manually inspect the diff: exactly one added line, no other hunks.
• Optional: pnpm --filter @eps/runner build to confirm the runner package still builds.

Out of scope

• No behavior changes, no other files touched.
• No commit/push in this plan run; the apply step is a separate follow-up after approval.