Wire the two internal tools from parts 1-2 end-to-end:
- `invokeInternalTool` RPC method added to RuntimeBridge; worker tool
`execute` calls route here, handler dispatches by tool name via the
new `agent-runtime/internal-tools/router.ts`.
- `InternalToolCallbacks` (`onApprovalCreated` / `onApprovalResolved`
/ `onDomainChanged`) are late-bound on the bridge via
`setInternalToolCallbacks`; `wire-api-server` now cross-wires the
same callbacks used by the HTTP approval route so thread integration
/ automation fire identically across both entry points.
- `RunJob.internalTools` (new field) carries the per-run tool list
main decides at dispatch time via `orchestration/internal-tool-
selector.ts`. Selection rule: `hire_agent` → any agent with
`canRequestHire` authority; `file_approval` → CEOs only (scoped to
the `approve_ceo_strategy` use case).
- Worker `createPiAgent` call site now assembles `codingTools +
internalTools` before handing to pi. Exhaustiveness guard on the
switch catches new tool names at compile time.
No prompt-level wiring yet — the `initial-user-turn` and
`team-building.en.md` updates ship in parts 4 and 5 so this commit
only adds the tool surface without changing the CEO's observable
behaviour (the existing HTTP path is still the one the prompt tells
the CEO to call).
tests: pnpm typecheck + pnpm test:unit (529) + pnpm test:eval (8/8) green