Fix: Run event processors and enrich transactions with contexts

[marandaneto]

📜 Description

Fix: Run event processors and enrich transactions with contexts

💡 Motivation and Context

Event processors were not run for transactions, so contexts were missing.
Some contexts are heavy for Android, hence there's a flag to not do IO nor IPC if it's a transaction.
Spring User is also run, hence transactions for the Spring integration will contain the user info.
Some fields from Event were moved to BaseEvent so transactions contain more data like breadcrumbs, extra, etc...

💚 How did you test it?

running and unit tests

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[marandaneto]

@bruno-garcia can we discuss this?

[marandaneto]

@bruno-garcia @maciejwalkowiak please review

[codecov-commenter]

Codecov Report

Merging #1430 (3e9d3bd) into main (6c8aae1) will increase coverage by 0.04%.
The diff coverage is 81.48%.

@@             Coverage Diff              @@
##               main    #1430      +/-   ##
============================================
+ Coverage     75.84%   75.88%   +0.04%     
- Complexity     1870     1889      +19     
============================================
  Files           186      187       +1     
  Lines          6405     6453      +48     
  Branches        639      633       -6     
============================================
+ Hits           4858     4897      +39     
- Misses         1258     1261       +3     
- Partials        289      295       +6     

Impacted Files	Coverage Δ	Complexity Δ
.../sentry/DuplicateEventDetectionEventProcessor.java	100.00% <ø> (ø)	11.00 <0.00> (ø)
sentry/src/main/java/io/sentry/SentryEvent.java	67.74% <ø> (-1.15%)	29.00 <0.00> (-11.00)
sentry/src/main/java/io/sentry/EventProcessor.java	50.00% <50.00%> (ø)	1.00 <1.00> (?)
sentry/src/main/java/io/sentry/SentryClient.java	86.30% <74.00%> (-2.15%)	84.00 <8.00> (-1.00)
...entry/src/main/java/io/sentry/SentryBaseEvent.java	78.94% <75.00%> (-6.47%)	36.00 <12.00> (+11.00)	⬇️
...ry/src/main/java/io/sentry/MainEventProcessor.java	84.15% <92.00%> (+8.44%)	41.00 <16.00> (+17.00)
...entry/spring/SentryUserProviderEventProcessor.java	96.55% <100.00%> (+0.55%)	12.00 <3.00> (+2.00)

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[marandaneto]

@maciejwalkowiak could you please check that I didn't break anything in the backend integrations for error monitoring and performance? thanks
Also test that it fixes #1335

[maciejwalkowiak]

As mentioned on Discord, unfortunately event processing for transactions doesn't save us from having a user filter. When transaction is finished, user is cleared from the thread local already.

I'll now just double check if nothing is off with the integrations.

[maciejwalkowiak]

Other than these small things mentioned above, LGTM