Harden Windows DLP enforcement and Electron runtime packaging

scripts/native-tabs-smoke.mjs

@@ -29,4 +29,5 @@ try{
  child=spawn(require('electron'),['scripts/native-tabs-smoke.cjs'],{env,windowsHide:true,stdio:['ignore','pipe','pipe']});child.stdout.on('data',b=>process.stdout.write(b));child.stderr.on('data',b=>{const message=String(b).replaceAll(code,'[fixture enrollment]').replaceAll(adminToken,'[fixture admin]');process.stderr.write(message);});
  const timer=setTimeout(()=>child.kill(),120000);const codeExit=await new Promise(r=>{child.once('exit',c=>r(c??1));child.once('error',()=>r(1));});clearTimeout(timer);assert.equal(codeExit,0,'Actual native tabs proof failed');
  assert.equal(posts.length,0,'Blocked fixture data reached receiver');await sdk.shutdown();sdk=null;const diagnostics=diagnosticStatus();assert.ok(diagnostics.spans>0&&diagnostics.logs>0&&diagnostics.timings&&diagnostics.parentChild&&diagnostics.correlatedLogs);assert.equal(diagnostics.sensitivePresent,false);assert.equal(diagnostics.crossProcessTrace,true,'Browser management span must parent actual backend HTTP request');for(const name of ['browser.ipc','browser.navigation','browser.dns','browser.request'])assert.ok(diagnostics.names.includes(name),`Missing native timing ${name}`);writeFileSync('artifacts/native-browser-diagnostics-proof.json',JSON.stringify(diagnostics,null,2));mkdirSync('artifacts',{recursive:true});writeFileSync('artifacts/native-tabs-receiver-proof.json',JSON.stringify({noBlockedPosts:true,requests,posts},null,2));
+// eslint-disable-next-line no-unsafe-finally -- Cleanup failure must fail closed rather than report successful protected cleanup.
 }finally{child?.kill();await sdk?.shutdown();if(previousEndpoint===undefined)delete process.env.OTEL_EXPORTER_OTLP_ENDPOINT;else process.env.OTEL_EXPORTER_OTLP_ENDPOINT=previousEndpoint;for(const server of [management,sink,collector])if(server)await new Promise(r=>{server.closeAllConnections?.();server.close(r);});store?.db.close();const target=resolve(directory);if(!target.startsWith(resolve(tmpdir())+sep)||!basename(target).startsWith('safetynet-native-tabs-'))throw Error('Unsafe fixture cleanup');rmSync(target,{recursive:true,force:true,maxRetries:10,retryDelay:100});}