✨ Add Browser RUM Salesforce package and support

[BeltranBulbarellaDD]

Motivation

Make the SDK not crash when instrumenting in Salesforce lightning environments.

Changes

You can review commit by commit.

First commit

Adds a new browser-rum-salesforce private package. It uses rum-slim and contains set up instructions for customers.

Second commit.

Adds the support on the SDK so it not crashes on LWC environment.

The main idea of this is to use isEventSupported to patch the 3 listeners LWC does not support and make the SDK crash. By using isEventSupported we can try to assign the listener and it fails safely.
We do this check on 3 things: change event of CookieStore, unhandledrejection event and securitypolicyviolation event listener

The other 2 changes is to safely access globalObject.location instead of just location per Salesforce docs.

Test instructions

Don't forget to make in the Dev Extension: Event collection strategy to Requests

Lightning application URL
Username: 1780401668150_test-avrjsf381uzm@example.com
Password: Ufv7@chnbkeqmdssfjfn

Experience Cloud URL

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]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 64.71%
• Overall Coverage: 76.68% (-0.01%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 0fe7170 | Docs | Datadog PR Page | Give us feedback!}

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	171.78 KiB	172.06 KiB	+286 B	+0.16%	✅
Rum Profiler	7.88 KiB	7.88 KiB	+2 B	+0.02%	✅
Rum Recorder	21.21 KiB	21.22 KiB	+7 B	+0.03%	✅
Logs	54.30 KiB	54.50 KiB	+211 B	+0.38%	✅
Rum Slim	129.68 KiB	129.89 KiB	+211 B	+0.16%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅

[chatgpt-codex-connector]

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Reviewed commit: 8c6cd15706

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[BenoitZugmeyer]

thought: I understand that we want to test for cookieStore "change" event explicitly, because else the session manager won't work correctly.

However, for other events, I wonder if it wouldn't be simpler to wrap the addEventListener in a try/catch and ignore event silently.

[BeltranBulbarellaDD]

I think this way just makes it clearer we are trying to attach the event in Salesforce. If we were to wrap the addEventListener we might catch/fail on other things without realizing it?

[BenoitZugmeyer]

nitpick: globalObject.window is a bit redundant

Suggested change

	if (!isEventSupported(globalObject.window, DOM_EVENT.UNHANDLED_REJECTION, noop)) {
	if (!isEventSupported(window, DOM_EVENT.UNHANDLED_REJECTION, noop)) {

[BeltranBulbarellaDD]

Actually it breaks compatibility. Do you think there is another way?

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 48f1282cc2

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• Comment "@codex review".

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