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/WebModulePorts.ts

@@ -38,6 +38,7 @@ export interface WebModuleResolutionBatch {
 
 /** Replaceable native resolution engine, with no provider protocol in callers. */
 export interface WebModuleResolutionPort {
+  close?(): Promise<void>;
   resolve(
     input: {
       readonly importerUrl: string;