chore(protocol): replace EventTarget interface with Metadata.wait

[dgozman]

Summary

• Drop the EventTarget protocol interface; its only command, waitForEventInfo, was already special-cased by the dispatcher.
• Carry wait info on Metadata.wait instead, and route waits through a fire-and-forget Connection.sendWaitMessage / dispatcher _handleWait path.
• Pre-render the action title server-side so tracing works without a metainfo entry.

[github-actions]

Test results for "MCP"

12 failed
❌ [chrome] › mcp/annotate.spec.ts:57 › should capture multiple screenshots in one annotation @mcp-windows-latest-chrome
❌ [chrome] › mcp/annotate.spec.ts:110 › should abort annotation when last screenshot is removed @mcp-windows-latest-chrome
❌ [chromium] › mcp/annotate.spec.ts:398 › should cancel browser_annotate when the MCP client disconnects @mcp-windows-latest-chromium
❌ [chromium] › mcp/annotate.spec.ts:427 › should switch screencast to -s session on show --annotate @mcp-windows-latest-chromium
❌ [chromium] › mcp/test-run.spec.ts:126 › test_run should stop when aborted @mcp-windows-latest-chromium
❌ [firefox] › mcp/annotate.spec.ts:173 › user-initiated annotate downloads zip with feedback.md @mcp-macos-latest-firefox
❌ [msedge] › mcp/test-run.spec.ts:126 › test_run should stop when aborted @mcp-windows-latest-msedge
❌ [webkit] › mcp/config.ini.spec.ts:57 › ini config sets browser launch options @mcp-windows-latest-webkit
❌ [webkit] › mcp/config.ini.spec.ts:89 › ini config sets server and network options @mcp-windows-latest-webkit
❌ [webkit] › mcp/config.spec.ts:138 › browser_get_config returns merged config from file, env and cli @mcp-windows-latest-webkit
❌ [webkit] › mcp/http.spec.ts:103 › http transport browser lifecycle (isolated) @mcp-windows-latest-webkit
❌ [webkit] › mcp/http.spec.ts:142 › http transport browser sigint @mcp-windows-latest-webkit

6471 passed, 969 skipped

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Merge workflow run.

[github-actions]

Test results for "tests 1"

23 failed
❌ [chromium-library] › library/tracing.spec.ts:784 › should not emit after w/o before @ubuntu-22.04-chromium-tip-of-tree
❌ [chromium-library] › library/tracing.spec.ts:784 › should not emit after w/o before @chromium-ubuntu-22.04-arm-node20
❌ [chromium-library] › library/tracing.spec.ts:784 › should not emit after w/o before @chromium-ubuntu-22.04-node24
❌ [chromium-library] › library/tracing.spec.ts:784 › should not emit after w/o before @chromium-ubuntu-22.04-node20
❌ [chromium-library] › library/tracing.spec.ts:784 › should not emit after w/o before @chromium-ubuntu-22.04-node22
❌ [firefox-library] › library/tracing.spec.ts:784 › should not emit after w/o before @firefox-ubuntu-22.04-node20
❌ [webkit-library] › library/tracing.spec.ts:784 › should not emit after w/o before @webkit-ubuntu-22.04-node20
❌ [playwright-test] › test-step.spec.ts:1175 › should report api steps @ubuntu-latest-node20
❌ [playwright-test] › test-step.spec.ts:1427 › calls from waitForEvent callback should be under its parent step @ubuntu-latest-node20
❌ [playwright-test] › test-step.spec.ts:1482 › reading network request / response should not be listed as step @ubuntu-latest-node20
❌ [playwright-test] › test-step.spec.ts:1175 › should report api steps @macos-latest-node20
❌ [playwright-test] › test-step.spec.ts:1427 › calls from waitForEvent callback should be under its parent step @macos-latest-node20
❌ [playwright-test] › test-step.spec.ts:1482 › reading network request / response should not be listed as step @macos-latest-node20
❌ [playwright-test] › test-step.spec.ts:1175 › should report api steps @ubuntu-latest-node24
❌ [playwright-test] › test-step.spec.ts:1427 › calls from waitForEvent callback should be under its parent step @ubuntu-latest-node24
❌ [playwright-test] › test-step.spec.ts:1482 › reading network request / response should not be listed as step @ubuntu-latest-node24
❌ [playwright-test] › test-step.spec.ts:1175 › should report api steps @ubuntu-latest-node22
❌ [playwright-test] › test-step.spec.ts:1427 › calls from waitForEvent callback should be under its parent step @ubuntu-latest-node22
❌ [playwright-test] › test-step.spec.ts:1482 › reading network request / response should not be listed as step @ubuntu-latest-node22
❌ [playwright-test] › test-step.spec.ts:1175 › should report api steps @windows-latest-node20
❌ [playwright-test] › test-step.spec.ts:1427 › calls from waitForEvent callback should be under its parent step @windows-latest-node20
❌ [playwright-test] › test-step.spec.ts:1482 › reading network request / response should not be listed as step @windows-latest-node20
❌ [playwright-test] › ui-mode-test-network-tab.spec.ts:395 › should copy network request @windows-latest-node20

2 flaky

⚠️ [chromium-library] › library/video.spec.ts:682 › screencast › should capture full viewport on hidpi `@chromium-ubuntu-22.04-arm-node20`
⚠️ [firefox-page] › page/page-request-gc.spec.ts:19 › should work `@firefox-ubuntu-22.04-node20`

41630 passed, 851 skipped

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Merge workflow run.