Fix trace ID mismatch in Sentry

[buenaflor]

📜 Description

Fixes an issue where Scope.clone() (used by withScope) created a new PropagationContext instead of sharing the existing one. Now, the PropagationContext instance is shared, ensuring trace continuity.

💡 Motivation and Context

This change fixes #3067, where different trace IDs were sent to Sentry events and HTTP Request Headers when withScope was used. The original Scope.clone() implementation was incorrectly creating a new PropagationContext, leading to inconsistent trace IDs and broken distributed tracing. By sharing the PropagationContext instance, trace IDs and baggage remain consistent across the original and cloned scopes.

💚 How did you test it?

Unit tests, manual testing

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.72%. Comparing base (793f4dc) to head (1fe94a8).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3069   +/-   ##
=======================================
  Coverage   87.72%   87.72%           
=======================================
  Files         286      286           
  Lines        9718     9719    +1     
=======================================
+ Hits         8525     8526    +1     
  Misses       1193     1193           

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[github-actions]

iOS Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1258.38 ms	1273.96 ms	15.58 ms
Size	7.86 MiB	9.44 MiB	1.58 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
e2d675d	1238.48 ms	1242.76 ms	4.28 ms
aeb02f2	1244.29 ms	1256.55 ms	12.26 ms
6ba4675	1223.12 ms	1238.17 ms	15.04 ms
9b99523	1256.06 ms	1270.33 ms	14.27 ms
2d34233	1258.19 ms	1268.92 ms	10.73 ms
b6c8720	1252.65 ms	1266.61 ms	13.96 ms
73a3c38	1263.37 ms	1277.90 ms	14.53 ms
93b7728	1247.23 ms	1264.87 ms	17.64 ms
0fb3800	1256.60 ms	1266.28 ms	9.68 ms
ec78888	1251.37 ms	1269.40 ms	18.04 ms

App size

Revision	Plain	With Sentry	Diff
e2d675d	7.86 MiB	9.44 MiB	1.58 MiB
aeb02f2	7.86 MiB	9.44 MiB	1.58 MiB
6ba4675	7.86 MiB	9.44 MiB	1.58 MiB
9b99523	7.86 MiB	9.44 MiB	1.58 MiB
2d34233	7.86 MiB	9.44 MiB	1.58 MiB
b6c8720	7.86 MiB	9.44 MiB	1.58 MiB
73a3c38	7.86 MiB	9.44 MiB	1.58 MiB
93b7728	7.86 MiB	9.44 MiB	1.58 MiB
0fb3800	7.86 MiB	9.44 MiB	1.58 MiB
ec78888	7.86 MiB	9.44 MiB	1.58 MiB

Previous results on branch: cursor/fix-trace-id-mismatch-in-sentry-b9d6

Startup times

Revision	Plain	With Sentry	Diff
4a7df4b	1257.51 ms	1272.77 ms	15.26 ms
94faec8	1246.73 ms	1255.59 ms	8.86 ms

App size

Revision	Plain	With Sentry	Diff
4a7df4b	7.86 MiB	9.44 MiB	1.58 MiB
94faec8	7.86 MiB	9.44 MiB	1.58 MiB

[github-actions]

Android Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	461.31 ms	552.43 ms	91.12 ms
Size	6.54 MiB	7.69 MiB	1.15 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
73dca78	476.53 ms	522.21 ms	45.68 ms
e2d675d	457.92 ms	529.17 ms	71.25 ms
2d34233	470.54 ms	558.90 ms	88.36 ms
73a3c38	478.18 ms	526.62 ms	48.44 ms
6ba4675	499.80 ms	632.43 ms	132.63 ms
93b7728	475.28 ms	489.13 ms	13.86 ms
aeb02f2	373.84 ms	437.00 ms	63.16 ms
dbd526b	504.88 ms	569.02 ms	64.15 ms
793f4dc	462.68 ms	544.21 ms	81.53 ms
640ad0c	466.00 ms	552.67 ms	86.67 ms

App size

Revision	Plain	With Sentry	Diff
73dca78	6.54 MiB	7.69 MiB	1.15 MiB
e2d675d	6.54 MiB	7.69 MiB	1.15 MiB
2d34233	6.54 MiB	7.55 MiB	1.01 MiB
73a3c38	6.54 MiB	7.69 MiB	1.15 MiB
6ba4675	6.54 MiB	7.53 MiB	1015.26 KiB
93b7728	6.54 MiB	7.69 MiB	1.15 MiB
aeb02f2	6.54 MiB	7.69 MiB	1.15 MiB
dbd526b	6.54 MiB	7.69 MiB	1.15 MiB
793f4dc	6.54 MiB	7.69 MiB	1.15 MiB
640ad0c	6.54 MiB	7.69 MiB	1.15 MiB

Previous results on branch: cursor/fix-trace-id-mismatch-in-sentry-b9d6

Startup times

Revision	Plain	With Sentry	Diff
94faec8	464.50 ms	527.90 ms	63.40 ms
4a7df4b	450.21 ms	546.29 ms	96.08 ms

App size

Revision	Plain	With Sentry	Diff
94faec8	6.54 MiB	7.69 MiB	1.15 MiB
4a7df4b	6.54 MiB	7.69 MiB	1.15 MiB