fix(rpc): resolve lint warnings from review follow-up

- Drop the redundant eslint-disable on AnyProcedures; no-explicit-any
  is off repo-wide so the directive itself was the warning. Doc
  comment now explains why none is needed.
- Rename test's schema binding to _schema per the lint config's
  underscore-prefix rule for read-only-as-type bindings.

packages/rpc/test/types.test.ts

@@ -4,9 +4,11 @@ import type { InferInput, ProcedureDef, ServiceContract } from "../src/types.ts"
 
 describe("rpc types", () => {
   test("InferInput extracts the validated shape from a schema", () => {
-    const schema = v.object({ userId: v.string(), amountCents: v.number() });
+    // Prefixed with _ : used only via `typeof`, and the lint config requires
+    // that prefix for a binding that is never read at runtime.
+    const _schema = v.object({ userId: v.string(), amountCents: v.number() });
     // Compile-time assertion: assigning a correctly-shaped value must typecheck.
-    const value: InferInput<typeof schema> = { userId: "u1", amountCents: 10 };
+    const value: InferInput<typeof _schema> = { userId: "u1", amountCents: 10 };
     expect(value.userId).toBe("u1");
   });