Capture unfinished transactions on crash

[romtsn]

📜 Description

• Keep on the UncaughtExceptionHint reference if we know there's an active transaction on scope. This transaction will then use the hint to call markFlushed and unblock the main thread once its serialization is done, which happens after the crash has been already serialized

Previously this was possible only if you capture exceptions manually:

💡 Motivation and Context

Closes #2316

💚 How did you test it?

📝 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.

🔮 Next steps

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	368.68 ms	433.93 ms	65.25 ms
Size	1.72 MiB	2.26 MiB	547.91 KiB

Previous results on branch: rz/feat/capture-unfinished-transactions

Startup times

Revision	Plain	With Sentry	Diff
44bf90b	370.62 ms	459.12 ms	88.50 ms
42bd05f	321.19 ms	365.20 ms	44.01 ms
6ee2c19	324.79 ms	362.37 ms	37.58 ms

App size

Revision	Plain	With Sentry	Diff
44bf90b	1.72 MiB	2.26 MiB	548.19 KiB
42bd05f	1.72 MiB	2.26 MiB	547.88 KiB
6ee2c19	1.72 MiB	2.26 MiB	547.91 KiB

[codecov]

Codecov Report

Patch coverage is 66.11% of modified lines.

Files Changed	Coverage
.../main/java/io/sentry/android/core/ANRWatchDog.java	ø
...n/java/io/sentry/android/ndk/NdkScopeObserver.java	ø
...ntry/android/sqlite/SentrySupportSQLiteDatabase.kt	ø
...n/kotlin/io/sentry/compose/SentryComposeTracing.kt	0.00%
...try/spring/boot/jakarta/InAppIncludesResolver.java	ø
...y/spring/boot/jakarta/SentryAutoConfiguration.java	0.00%
...akarta/SentryLogbackAppenderAutoConfiguration.java	ø
.../spring/boot/jakarta/SentryLogbackInitializer.java	ø
...o/sentry/spring/boot/jakarta/SentryProperties.java	ø
...boot/jakarta/SentrySpanRestTemplateCustomizer.java	ø
... and 107 more

📢 Thoughts on this report? Let us know!.

[adinauer]

If there's no problem with the code where I added an assumption this LGTM after giving it a quick pass.

[stefanosiano]

looks good!