👷‍♀️ [RUM-8295] Change anonymous id format to uuid

[cy-moi]

Motivation

Change anonymous id format to uuid so we achieve:

1. Fewer collisions when >100M device concurrencies
2. Aligned with other ids and with mobile sdk

Changes

Use generateUUID() for anonymous id generation
Update e2e tests and unit tests to test effectively.

Testing

• Local
• Staging
• Unit
• End to end

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I have gone over the contributing documentation.

[cy-moi]

/to-staging

[dd-devflow]

Devflow running: /to-staging

View all feedbacks in Devflow UI.

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2025-01-30 16:38:24 UTC ℹ️ Branch Integration: starting soon, median merge time is 10m45s

Commit 4f471c612f will soon be integrated into staging-05.

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2025-01-30 16:52:23 UTC ℹ️ Branch Integration: This commit was successfully integrated

Commit 4f471c612f has been merged into staging-05 in merge commit 233d688db1.

Check out the triggered pipeline on Gitlab 🦊

If you need to revert this integration, you can use the following command: /code revert-integration -b staging-05

[thomas-lebeau]

❓ question: ‏ Why removing these tests?

[cy-moi]

Sorry, this one is wrongly removed. I put them back.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.96%. Comparing base (b7fcfcb) to head (89ceca7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3306      +/-   ##
==========================================
- Coverage   92.96%   92.96%   -0.01%     
==========================================
  Files         297      297              
  Lines        7851     7849       -2     
  Branches     1791     1791              
==========================================
- Hits         7299     7297       -2     
  Misses        552      552              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[cit-pr-commenter]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	146.74 KiB	146.68 KiB	-68 B	-0.05%	✅
Logs	51.19 KiB	51.13 KiB	-67 B	-0.13%	✅
Rum Slim	105.49 KiB	105.43 KiB	-67 B	-0.06%	✅
Worker	24.50 KiB	24.50 KiB	0 B	0.00%	✅

🚀 CPU Performance

Action Name	Base Average Cpu Time (ms)	Local Average Cpu Time (ms)	𝚫
addglobalcontext	0.002	0.002	-0.000
addaction	0.049	0.036	-0.012
addtiming	0.001	0.001	-0.000
adderror	0.067	0.051	-0.016
startstopsessionreplayrecording	0.007	0.012	0.004
startview	0.369	0.378	0.009
logmessage	0.024	0.020	-0.003

🧠 Memory Performance

Action Name	Base Consumption Memory (bytes)	Local Consumption Memory (bytes)	𝚫 (bytes)
addglobalcontext	26.98 KiB	27.90 KiB	939 B
addaction	56.46 KiB	55.90 KiB	-579 B
addtiming	29.48 KiB	31.99 KiB	2.51 KiB
adderror	63.74 KiB	63.30 KiB	-458 B
startstopsessionreplayrecording	25.96 KiB	26.54 KiB	592 B
startview	418.79 KiB	421.90 KiB	3.12 KiB
logmessage	63.65 KiB	61.84 KiB	-1860 B

🔗 RealWorld

[cy-moi]

This is removed as renewSession is basically putting the id back manually. So the test is not much meaningful. Plus, we should not restart a session when the cookie cleared by third party.

[cy-moi]

Avoid calling manual expireSession here to test the anonymous id logic fully.

[thomas-lebeau]

I think the expireSession helper could be improve to actually expire the session.
I think with playwright we could use await page.clock.runFor(SESSION_TIME_OUT_DELAY)

maybe you can add a not and we can revert this change when we have migrated to playwright fully