feat(core): [Logs and Metrics Enable Flags 12] Remove Metrics enable flag

[adinauer]

PR Stack (Logs and Metrics Enable Flags)

• feat(core): Remove Logs and Metrics enable flags #5939
• feat(logback): [Logs and Metrics Enable Flags 1] Add Logs opt-in #5940
• feat(log4j2): [Logs and Metrics Enable Flags 2] Add Logs opt-in #5941
• feat(jul): [Logs and Metrics Enable Flags 3] Add Logs opt-in #5942
• feat(android): [Logs and Metrics Enable Flags 4] Add Timber Logs opt-in #5943
• feat(android): [Logs and Metrics Enable Flags 5] Add Logcat Logs opt-in #5945
• feat(spring): [Logs and Metrics Enable Flags 6] Add logging Logs opt-in #5946
• feat(core): [Logs and Metrics Enable Flags 7] Remove Logs enable flag #5947
• feat(android): [Logs and Metrics Enable Flags 8] Warn for legacy Logs metadata #5949
• feat(core): [Logs and Metrics Enable Flags 9] Warn for legacy Logs configuration #5950
• feat(spring): [Logs and Metrics Enable Flags 10] Warn for legacy Logs property #5951
• perf(core): [Logs and Metrics Enable Flags 11] Avoid unused Logs worker thread #5952
• feat(core): [Logs and Metrics Enable Flags 12] Remove Metrics enable flag #5953
• feat(android): [Logs and Metrics Enable Flags 13] Warn for legacy Metrics metadata #5954
• feat(core): [Logs and Metrics Enable Flags 14] Warn for legacy Metrics configuration #5955
• feat(spring): [Logs and Metrics Enable Flags 15] Warn for legacy Metrics property #5956
• perf(core): [Logs and Metrics Enable Flags 16] Avoid unused Metrics worker thread #5957
• fix(jul): [Logs and Metrics Enable Flags 17] Preserve null-message records #5960
• docs: [Logs and Metrics Enable Flags 18] Update options guidance #5961
• fix(android): [Logs and Metrics Enable Flags 19] Read Timber option lazily #5964
• fix(core): [Logs and Metrics Enable Flags 20] Make migration warnings visible #5966

---

📜 Description

Removes the aggregate Metrics enable option from SentryOptions.Metrics. Manual Sentry.metrics() calls now capture without an enable flag, and SentryClient always creates the configured Metrics batch processor.

Legacy metrics.enabled external configuration and io.sentry.metrics.enabled Android metadata remain detectable for follow-up migration warnings, but their values are no longer applied. NoOpMetricsBatchProcessor remains available as a separate public API.

💡 Motivation and Context

Metrics are a manual namespaced API and no production integration currently generates them automatically. Requiring an aggregate enable option adds configuration without protecting users from automatic instrumentation.

💚 How did you test it?

• ./gradlew :sentry:test :sentry-android-core:testReleaseUnitTest
• ./gradlew spotlessApply apiDump
• Verified explicit legacy external and Android false values do not disable capture
• Verified the configured Metrics batch processor is always created
• Verified the removed methods disappear from the core API dump

📝 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

Add an Android migration warning for explicit legacy io.sentry.metrics.enabled metadata.

⚠️ Merge this PR using a merge commit (not squash). Only the collection branch is squash-merged into main.

[github-actions]

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

Generated by 🚫 dangerJS against ab38817

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.52.0 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	312.54 ms	354.06 ms	41.52 ms
Size	0 B	0 B	0 B

Baseline results on branch: perf/logs-batch-thread-first-use

Startup times

Revision	Plain	With Sentry	Diff
31a945a	307.74 ms	351.86 ms	44.11 ms

App size

Revision	Plain	With Sentry	Diff
31a945a	0 B	0 B	0 B

Previous results on branch: feat/remove-metrics-enable-flag

Startup times

Revision	Plain	With Sentry	Diff
aceb315	315.40 ms	346.49 ms	31.09 ms

App size

Revision	Plain	With Sentry	Diff
aceb315	0 B	0 B	0 B