feat: add flag to SentryNavigatorObserver to enable/disable starting new traces on navigation

[buenaflor]

📜 Description

💡 Motivation and Context

Should allow users to control whether they want this tracing behaviour.

💚 How did you test it?

📝 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

[github-actions]

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

Generated by 🚫 dangerJS against fbb8c46

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.90%. Comparing base (6f47800) to head (fbb8c46).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3096      +/-   ##
==========================================
+ Coverage   87.91%   88.90%   +0.99%     
==========================================
  Files         287       97     -190     
  Lines        9763     3525    -6238     
==========================================
- Hits         8583     3134    -5449     
+ Misses       1180      391     -789     

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[denrase]

Would enableAutoTransactions somehow have an effect on enableNewTraceOnNavigation?

[buenaflor]

no, the trace does not collide with transactions at all. it's all a bit confusing since trace and transactions can be confused with one another.

the trace here refers to the concept of a trace (e.g traceId) that all transactions and errors are part of.

that being said I plan on deprecating the enableAutoTransactions at some point anyway

[denrase]

Looks good, just one question.

[github-actions]

iOS Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1249.17 ms	1254.41 ms	5.24 ms
Size	7.86 MiB	9.44 MiB	1.58 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
93b7728	1247.23 ms	1264.87 ms	17.64 ms
2d34233	1258.19 ms	1268.92 ms	10.73 ms
ec78888	1251.37 ms	1269.40 ms	18.04 ms
73a3c38	1263.37 ms	1277.90 ms	14.53 ms
b6c8720	1252.65 ms	1266.61 ms	13.96 ms
6f47800	1247.52 ms	1259.37 ms	11.85 ms
73dca78	1246.65 ms	1265.42 ms	18.76 ms
6ba4675	1223.12 ms	1238.17 ms	15.04 ms
aeb02f2	1244.29 ms	1256.55 ms	12.26 ms
640ad0c	1241.04 ms	1253.96 ms	12.92 ms

App size

Revision	Plain	With Sentry	Diff
93b7728	7.86 MiB	9.44 MiB	1.58 MiB
2d34233	7.86 MiB	9.44 MiB	1.58 MiB
ec78888	7.86 MiB	9.44 MiB	1.58 MiB
73a3c38	7.86 MiB	9.44 MiB	1.58 MiB
b6c8720	7.86 MiB	9.44 MiB	1.58 MiB
6f47800	7.86 MiB	9.44 MiB	1.58 MiB
73dca78	7.86 MiB	9.44 MiB	1.58 MiB
6ba4675	7.86 MiB	9.44 MiB	1.58 MiB
aeb02f2	7.86 MiB	9.44 MiB	1.58 MiB
640ad0c	7.86 MiB	9.44 MiB	1.58 MiB

[github-actions]

Android Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	437.69 ms	525.74 ms	88.06 ms
Size	6.54 MiB	7.69 MiB	1.15 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
c8596a6	474.00 ms	492.96 ms	18.96 ms
81f83eb	471.40 ms	522.14 ms	50.74 ms
93b7728	475.28 ms	489.13 ms	13.86 ms
aeb02f2	373.84 ms	437.00 ms	63.16 ms
793f4dc	462.68 ms	544.21 ms	81.53 ms
b6c8720	457.41 ms	519.04 ms	61.63 ms
6f47800	451.04 ms	509.64 ms	58.60 ms
575ebaa	478.00 ms	585.76 ms	107.76 ms
640ad0c	466.00 ms	552.67 ms	86.67 ms
827bf09	475.40 ms	547.14 ms	71.74 ms

App size

Revision	Plain	With Sentry	Diff
c8596a6	6.54 MiB	7.53 MiB	1015.27 KiB
81f83eb	6.54 MiB	7.69 MiB	1.15 MiB
93b7728	6.54 MiB	7.69 MiB	1.15 MiB
aeb02f2	6.54 MiB	7.69 MiB	1.15 MiB
793f4dc	6.54 MiB	7.69 MiB	1.15 MiB
b6c8720	6.54 MiB	7.69 MiB	1.15 MiB
6f47800	6.54 MiB	7.69 MiB	1.15 MiB
575ebaa	6.54 MiB	7.69 MiB	1.15 MiB
640ad0c	6.54 MiB	7.69 MiB	1.15 MiB
827bf09	6.54 MiB	7.53 MiB	1015.27 KiB