feat(metrics): [Trace Metrics 16] Only send user attributes if sendDefaultPii is true

[adinauer]

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[adinauer]

• feat(metrics): [Trace Metrics 27] Automatically use SentryOptions.Metrics.BeforeSendMetricCallback Spring beans #5021 : 2 dependent PRs (#5022 , #5024 )
• feat(metrics): [Trace Metrics 26] SentryMetricsParameters create shortcut for attributes map #5020
• feat(metrics): [Trace Metrics 25] Add Hint to Metrics #5019
• feat(metrics): [Trace Metrics 24] PR Feedback #5013
• feat(metrics): [Trace Metrics 23] Add E2E tests for Metrics #5011
• feat(metrics): [Trace Metrics 22] Close and flush MetricsBatchProcessor from SentryClient #5010
• Use uv for managing python version #5009
• feat(metrics): [Trace Metrics 21] Add AI rules files for Metrics (and update feature flags rule) #5008
• feat(metrics): [Trace Metrics 20] Add device and OS attributes to metrics #5007
• feat(metrics): [Trace Metrics 19] Create SentryMetricsParameters for Metrics #5006
• feat(metrics): [Trace Metrics 18] Add unit tests for Metrics #5005
• feat(metrics): [Trace Metrics 17] Remove Experimental Annotation from Metrics Options #4996
• feat(metrics): [Trace Metrics 16] Only send user attributes if sendDefaultPii is true #4995 👈 (View in Graphite)
• feat(metrics): [Trace Metrics 15] Android Metrics batch processor and factory #4994
• feat(metrics): [Trace Metrics 14] Metrics Manifest options for Android #4993
• feat(metrics): [Trace Metrics 13] Metrics external options #4992
• feat(metrics): [Trace Metrics 12] Record client report for discarded metrics envelope item #4991
• feat(metrics): [Trace Metrics 11] Metrics Envelope item deserialization #4990
• feat(metrics): [Trace Metrics 10] Metrics Gauge API #4989
• feat(metrics): [Trace Metrics 9] Metrics Distribution API #4988
• feat(metrics): [Trace Metrics 8] Metrics Count API #4987
• feat(metrics): [Trace Metrics 7] Metrics counter basic API #4986
• feat(metrics): [Trace Metrics 6] Implement SentryClient for Metrics #4985
• feat(metrics): [Trace Metrics 5] Add batch processor for Metrics #4984
• feat(metrics): [Trace Metrics 4] Add transport types for metrics #4983
• feat(metrics): [Trace Metrics 3] Enable metrics by default #4982
• feat(metrics): [Trace Metrics 2] MetricsApi stub #4981
• feat(metrics): [Trace Metrics 1] Metrics Options #4980
• feat/trace-metrics

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[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

### Features

- [Trace Metrics 16] Only send user attributes if sendDefaultPii is true ([#4995](https://github.com/getsentry/sentry-java/pull/4995))

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	306.06 ms	361.63 ms	55.57 ms
Size	1.58 MiB	2.20 MiB	635.46 KiB

[markushi]

Should this be guarded by sendDefaultPii as well?

[adinauer]

Will check

[adinauer]

Wasn't able to find a sendDefaultPii check for server name in other places and there's a dedicated option (isAttachServerName) for this too. So this seems to align with what we do in other places.

[markushi]

At least on Android [we always seem to at least set the installation id] when no user is manually set, (

sentry-java/sentry-android-core/src/main/java/io/sentry/android/core/DefaultAndroidEventProcessor.java

Lines 168 to 173 in 3258517

	if (user.getId() == null) {
	user.setId(options.getRuntimeManager().runWithRelaxedPolicy(() -> Installation.id(context)));
	}
	if (user.getIpAddress() == null && options.isSendDefaultPii()) {
	user.setIpAddress(IpAddressUtils.DEFAULT_IP_ADDRESS);
	}

), regardless of sendDefaultPii.
Doesn't need to be addressed here, but maybe worth talking about (also affects logs).

[adinauer]

Created #5018 so we can track it separately and unblock this PR.

[adinauer]

cursor review

[cursor]

✅ Bugbot reviewed your changes and found no bugs!