👷 Add pinned Firefox 119 + WebKit 17.4 e2e test runner without BrowserStack

[thomas-lebeau]

Motivation

Replicate the BrowserStack Firefox 119 + WebKit 17.4 coverage locally so we can keep running pinned-browser e2e tests without BrowserStack, and lay the groundwork for a CI eval loop that iterates on GitLab jobs autonomously.

Changes

• Add e2e-pinned GitLab job and test:e2e:pinned script driven by a new playwright.pinned.config.ts.
• Run the pinned matrix via Playwright 1.40.1 run-server plus a small translation proxy (test/e2e/scripts/pinned-proxy.mjs) so the current 1.58 client can talk to the older server.
• Pre-install Playwright browsers (current Chromium + pinned FF 119 / WK 17.4) in the CI image; bump CURRENT_CI_IMAGE to 106.
• Use the test page's own origin in flushEvents so the flush works for pages served from custom domains (WebKit fix).
• Skip iframe-without-src session cookie tests on Firefox.
• Document the autonomous CI eval loop approach in APPROACH.md.

Test instructions

• yarn test:e2e:pinned:init then yarn test:e2e:pinned locally to run Firefox 119 + WebKit 17.4.
• Verify the e2e-pinned job runs green in GitLab on this branch.

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[datadog-official]

✨ Fix all issues with BitsAI or with Cursor

⚠️ Warnings

🧪 5 Tests failed

developer extension › should switch between tabs › async from developer-extension/developerExtension.scenario.ts     (Fix with Cursor)

developerExtension.scenario.ts:8:13 async

[chromium] › developer-extension/developerExtension.scenario.ts:8:13 › developer extension › should switch between tabs › async 

    Error: page.goto: net::ERR_FILE_NOT_FOUND at chrome-extension://ddlbenlpndknhmiknkjdcnogckbkhojd/flush
    Call log:
      - navigating to "chrome-extension://ddlbenlpndknhmiknkjdcnogckbkhojd/flush", waiting until "load"


       at ../lib/framework/flushEvents.ts:7
...

developer extension › should switch between tabs › bundle from developer-extension/developerExtension.scenario.ts     (Fix with Cursor)

developerExtension.scenario.ts:8:13 bundle

[chromium] › developer-extension/developerExtension.scenario.ts:8:13 › developer extension › should switch between tabs › bundle 

    Error: page.goto: net::ERR_FILE_NOT_FOUND at chrome-extension://ddlbenlpndknhmiknkjdcnogckbkhojd/flush
    Call log:
      - navigating to "chrome-extension://ddlbenlpndknhmiknkjdcnogckbkhojd/flush", waiting until "load"


       at ../lib/framework/flushEvents.ts:7
...

developer extension › should switch between tabs › npm from developer-extension/developerExtension.scenario.ts     (Fix with Cursor)

developerExtension.scenario.ts:8:13 npm

[chromium] › developer-extension/developerExtension.scenario.ts:8:13 › developer extension › should switch between tabs › npm 

    Error: page.goto: net::ERR_FILE_NOT_FOUND at chrome-extension://ddlbenlpndknhmiknkjdcnogckbkhojd/flush
    Call log:
      - navigating to "chrome-extension://ddlbenlpndknhmiknkjdcnogckbkhojd/flush", waiting until "load"


       at ../lib/framework/flushEvents.ts:7
...

View all

ℹ️ Info

No other issues found (see more)

❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 77.47%

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_{This comment will be updated automatically if new data arrives.
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[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	N/A	169.21 KiB	N/A	N/A	N/A
Rum Profiler	N/A	6.10 KiB	N/A	N/A	N/A
Rum Recorder	N/A	21.22 KiB	N/A	N/A	N/A
Logs	N/A	54.56 KiB	N/A	N/A	N/A
Rum Slim	N/A	127.56 KiB	N/A	N/A	N/A
Worker	N/A	22.99 KiB	N/A	N/A	N/A

🚀 CPU Performance

Action Name	Base CPU Time (ms)	Local CPU Time (ms)	𝚫%
addglobalcontext	N/A	0.0018	N/A
addaction	N/A	0.0126	N/A
adderror	N/A	0.0108	N/A
addtiming	N/A	0.0005	N/A
startview	N/A	0.0107	N/A
startstopsessionreplayrecording	N/A	0.0007	N/A
logmessage	N/A	0.0154	N/A

🧠 Memory Performance

Action Name	Base Memory Consumption	Local Memory Consumption	𝚫
addglobalcontext	N/A	38.21 KiB	N/A
addaction	N/A	62.24 KiB	N/A
addtiming	N/A	38.21 KiB	N/A
adderror	N/A	68.97 KiB	N/A
startstopsessionreplayrecording	N/A	41.46 KiB	N/A
startview	N/A	478.62 KiB	N/A
logmessage	N/A	54.26 KiB	N/A

🔗 RealWorld