fix: Synchronization issue in FramesTracker

[philipphofmann]

📜 Description

Synchronize the call to SentryFramesTracker.resetProfilingTimestamps by dispatching it to the main thread cause there is no guarantee that the SDK calls this method on the main thread. Previously, this issue led to crashes in SentryFramesTracker.

💡 Motivation and Context

Fixes GH-3511

💚 How did you test it?

Unit test.

📝 Checklist

You have to check all boxes before merging:

• 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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (89491ad) 89.262% compared to head (2cc0c08) 89.269%.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3571       +/-   ##
=============================================
+ Coverage   89.262%   89.269%   +0.006%     
=============================================
  Files          529       529               
  Lines        57716     57752       +36     
  Branches     20653     20669       +16     
=============================================
+ Hits         51519     51555       +36     
- Misses        5287      5288        +1     
+ Partials       910       909        -1     

Files	Coverage Δ
Sources/Sentry/SentryDependencyContainer.m	95.330% <100.000%> (+0.018%)	⬆️
Sources/Sentry/SentryFramesTracker.m	100.000% <100.000%> (ø)
...SentryProfilerTests/SentryProfilerSwiftTests.swift	97.739% <100.000%> (ø)
.../AppStartTracking/SentryAppStartTrackerTests.swift	98.511% <100.000%> (ø)
...ance/FramesTracking/SentryFramesTrackerTests.swift	99.166% <100.000%> (+0.025%)	⬆️
...iewController/SentryTimeToDisplayTrackerTest.swift	99.696% <100.000%> (ø)
...ests/SentryTests/Transaction/SentrySpanTests.swift	99.389% <100.000%> (ø)

... and 12 files with indirect coverage changes

---

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1231.10 ms	1248.78 ms	17.67 ms
Size	21.58 KiB	418.00 KiB	396.42 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
e324230	1244.43 ms	1252.98 ms	8.55 ms
d760c3f	1200.95 ms	1233.96 ms	33.00 ms
5d6ce0e	1227.57 ms	1241.08 ms	13.51 ms
7cd187e	1223.41 ms	1249.40 ms	26.00 ms
407ff99	1216.63 ms	1235.50 ms	18.87 ms
dc0db9e	1246.06 ms	1260.46 ms	14.40 ms
881a955	1230.98 ms	1246.22 ms	15.24 ms
98cca71	1210.75 ms	1240.64 ms	29.89 ms
9faf217	1268.86 ms	1274.82 ms	5.96 ms
e1eed6b	1224.63 ms	1234.84 ms	10.20 ms

App size

Revision	Plain	With Sentry	Diff
e324230	22.85 KiB	408.88 KiB	386.03 KiB
d760c3f	22.84 KiB	403.17 KiB	380.33 KiB
5d6ce0e	22.85 KiB	405.38 KiB	382.53 KiB
7cd187e	20.76 KiB	401.66 KiB	380.89 KiB
407ff99	20.76 KiB	427.87 KiB	407.10 KiB
dc0db9e	20.76 KiB	419.62 KiB	398.86 KiB
881a955	22.85 KiB	407.63 KiB	384.79 KiB
98cca71	22.85 KiB	411.14 KiB	388.29 KiB
9faf217	20.76 KiB	419.70 KiB	398.94 KiB
e1eed6b	20.76 KiB	432.17 KiB	411.41 KiB

Previous results on branch: fix/frames-tracker-sync-issue

Startup times

Revision	Plain	With Sentry	Diff
4e609e2	1219.94 ms	1236.46 ms	16.52 ms

App size

Revision	Plain	With Sentry	Diff
4e609e2	21.58 KiB	418.04 KiB	396.46 KiB

[brustolin]

tvOS tests are failing, everything else LGTM