fix(browser): retain module resolver cleanup ownership

Serialize resolution with shutdown, retain the owned browser after close failures, and retry cleanup before another launch. Wire cleanup through the shared service and CLI/MCP lifecycles, preserving primary failures and completed native reports alongside cleanup diagnostics.

Separate the browser resolution workflow from lifecycle ownership. Validation: seven resolver source tests, eleven application tests, MCP shutdown retry, public CLI parity, and full static/architecture checks passed. Real Chromium behavior remains unverified.

src/application/WebModuleTraceService.ts

@@ -69,6 +69,10 @@ export class WebModuleTraceService {
     readonly resolver: WebModuleResolutionPort,
   ) {}
 
+  close(): Promise<void> {
+    return this.resolver.close?.() ?? Promise.resolve();
+  }
+
   async trace(
     rawInput: unknown,
     options?: ExecutionOptions,