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.

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## Unreleased

### Features

- [Trace Metrics 25] Add Hint to Metrics ([#5019](https://github.com/getsentry/sentry-java/pull/5019))

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• 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 👈 (View in Graphite)
• 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
• 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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