Report dropped spans

[stefanosiano]

:scroll: Description

added span data category for client reports added dropped span report when recording lostEnvelopeItem added dropped span report on beforeSend and eventProcessor filtering (SentryClient) and backpressure and sampleRate (Hub)

:bulb: Motivation and Context

Closes https://github.com/getsentry/sentry-java/issues/3527

:green_heart: How did you test it?

Unit tests

:pencil: Checklist

• [ ] I reviewed the submitted code.
• [ ] 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.
• [ ] 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.

:crystal_ball: Next steps

[github-actions[bot]]

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

Generated by :no_entry_sign: dangerJS against adcfd0329c7e2473db52f927a2cc26ad8d7e1f87

[github-actions[bot]]

Performance metrics :rocket:

	Plain	With Sentry	Diff
Startup time	399.60 ms	472.17 ms	72.57 ms
Size	1.70 MiB	2.28 MiB	593.48 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
baaf6371cb120f45ad4fed59e8b97e65e3381cfd	462.32 ms	579.22 ms	116.90 ms
28c9a83af55b119517dbd2fcf74975fb5822907b	416.98 ms	479.90 ms	62.92 ms
201048a0cf146f24a001d1c7997aae2ef84b23c3	418.62 ms	481.67 ms	63.05 ms
7ab32b6ab8bc72b973328a00840eb192b151b59f	373.62 ms	480.61 ms	106.99 ms
b172d4ed57bfa46dfac6bee0216bea7d0126b253	352.92 ms	446.50 ms	93.58 ms
3d8bd2ba0c81c9aa6084fa222f9a7706cf5e8d92	364.76 ms	469.98 ms	105.22 ms
1e05e43aac4e7f22213e0ec71fa5a89a74588c91	411.00 ms	467.29 ms	56.29 ms
c554ca260c5f0fa79a30d592f6c0e08a850a5014	383.78 ms	449.84 ms	66.06 ms
0bd723b1c59af639c4a86bbade526e0108096f8e	375.20 ms	452.41 ms	77.20 ms
99a51e2957c3044db1b481b67e733b42ee267926	405.11 ms	479.65 ms	74.54 ms

App size

Revision	Plain	With Sentry	Diff
baaf6371cb120f45ad4fed59e8b97e65e3381cfd	1.72 MiB	2.27 MiB	558.42 KiB
28c9a83af55b119517dbd2fcf74975fb5822907b	1.70 MiB	2.28 MiB	592.00 KiB
201048a0cf146f24a001d1c7997aae2ef84b23c3	1.70 MiB	2.28 MiB	592.32 KiB
7ab32b6ab8bc72b973328a00840eb192b151b59f	1.70 MiB	2.27 MiB	584.63 KiB
b172d4ed57bfa46dfac6bee0216bea7d0126b253	1.72 MiB	2.29 MiB	578.09 KiB
3d8bd2ba0c81c9aa6084fa222f9a7706cf5e8d92	1.72 MiB	2.29 MiB	577.53 KiB
1e05e43aac4e7f22213e0ec71fa5a89a74588c91	1.70 MiB	2.28 MiB	590.89 KiB
c554ca260c5f0fa79a30d592f6c0e08a850a5014	1.70 MiB	2.27 MiB	582.25 KiB
0bd723b1c59af639c4a86bbade526e0108096f8e	1.72 MiB	2.29 MiB	578.09 KiB
99a51e2957c3044db1b481b67e733b42ee267926	1.72 MiB	2.29 MiB	576.34 KiB

Previous results on branch: feat/report-dropped-spans

Startup times

Revision	Plain	With Sentry	Diff
0bd6ff3221bee1792cd383de8082beee63997c9d	429.51 ms	497.54 ms	68.03 ms
8007b45b35b1a384acbb5d268372aea73d63c782	374.00 ms	435.50 ms	61.50 ms

App size

Revision	Plain	With Sentry	Diff
0bd6ff3221bee1792cd383de8082beee63997c9d	1.70 MiB	2.28 MiB	593.54 KiB
8007b45b35b1a384acbb5d268372aea73d63c782	1.70 MiB	2.28 MiB	593.48 KiB

[adinauer]

Can you please also take care of merging this into the 8.x.x branch 🙏 (most likely via main)

[stefanosiano]

Can you please also take care of merging this into the 8.x.x branch 🙏 (most likely via main)

https://github.com/getsentry/sentry-java/pull/3536