Pass the parsed tool ref to the deployment tool caller, not the raw body

[davidmckayv]

What this changes

Restores main to a clean typecheck. The agent-tool-call route validates its input into parsedCall (from #510), but the deployment-tool-caller call still read the raw body (name: body.name, args: body.args ?? {}) — where body is possibly null and body.name possibly undefined, and the narrowing guard that used to cover it was removed. That left server/src/app.ts:1333 failing bun run typecheck and bun run build on main.

The call now passes the validated, store-shaped values: name: parsedCall.value.ref (the mcp__server__tool → server/tool mapping the parser already performs) and args: parsedCall.value.args. Same runtime behavior the mapping always produced; the raw, unnarrowed body is no longer read.

Where it runs

Server route wiring only. No behavior change beyond restoring the intended validated path.

Proof

bun run typecheck, bun run build, bun run lint, bun run format:check all clean; server/tests/agent-tool-call-input.test.ts 26/0.