fix(companion): validate runtime and heartbeat loop options

src/companion/runtimeClient.test.ts

@@ -96,6 +96,15 @@ afterAll(async () => {
 });
 
 describe('CompanionRuntimeClient', () => {
+  it('validates requestTimeoutMs option', () => {
+    expect(() => {
+      new CompanionRuntimeClient({
+        url: 'ws://127.0.0.1:1',
+        requestTimeoutMs: 0,
+      });
+    }).toThrow('requestTimeoutMs must be a positive number');
+  });
+
   it('dispatches gateway events to subscribed handlers and supports unsubscribe', () => {
     const client = new CompanionRuntimeClient({
       url: 'ws://127.0.0.1:1',