fix(stalls): Missing measurements when using new .end() span API

[krystofwoldrich]

📢 Type of change

• Bugfix
• Enhancement
• Refactoring

📜 Description

This PR is a preparation for JS V8 and its new performance spans-only API. It fixes a small bug where .end methods were not patched.

This PR refactors StallTracking integration tests to avoid using Transaction and internal APIs.

This will enable us to refactor the integration in the future with confidence and minimal test changes.

📝 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
• All tests passing
• No breaking changes

🔮 Next steps

[github-actions]

Android (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	433.71 ms	474.20 ms	40.49 ms
Size	17.73 MiB	19.93 MiB	2.20 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
80b2ce3	385.02 ms	387.36 ms	2.34 ms
8900e1a+dirty	430.68 ms	456.13 ms	25.44 ms
d0bf494+dirty	375.37 ms	395.14 ms	19.77 ms
e2b64fe	316.88 ms	330.23 ms	13.35 ms
52a8031+dirty	311.55 ms	321.37 ms	9.82 ms
457e29f	398.10 ms	421.39 ms	23.29 ms
d7401ac+dirty	375.20 ms	383.51 ms	8.31 ms
12427f4	393.69 ms	414.84 ms	21.14 ms
9c48b2c	349.24 ms	385.96 ms	36.72 ms
d361d38	354.10 ms	381.69 ms	27.59 ms

App size

Revision	Plain	With Sentry	Diff
80b2ce3	17.73 MiB	19.75 MiB	2.02 MiB
8900e1a+dirty	17.73 MiB	19.75 MiB	2.01 MiB
d0bf494+dirty	17.73 MiB	19.75 MiB	2.02 MiB
e2b64fe	17.73 MiB	19.80 MiB	2.07 MiB
52a8031+dirty	17.73 MiB	20.04 MiB	2.31 MiB
457e29f	17.73 MiB	19.84 MiB	2.10 MiB
d7401ac+dirty	17.73 MiB	19.75 MiB	2.02 MiB
12427f4	17.73 MiB	19.85 MiB	2.12 MiB
9c48b2c	17.73 MiB	19.80 MiB	2.07 MiB
d361d38	17.73 MiB	19.81 MiB	2.08 MiB

Previous results on branch: kw-fix-stalltracking-for-new-span-apis

Startup times

Revision	Plain	With Sentry	Diff
aaae1a1	410.70 ms	451.12 ms	40.42 ms

App size

Revision	Plain	With Sentry	Diff
aaae1a1	17.73 MiB	19.93 MiB	2.20 MiB

[github-actions]

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	325.21 ms	354.57 ms	29.37 ms
Size	7.15 MiB	8.21 MiB	1.06 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
e2b64fe+dirty	258.82 ms	304.26 ms	45.44 ms
9c48b2c+dirty	270.82 ms	321.12 ms	50.30 ms
22e31b6+dirty	295.75 ms	346.73 ms	50.98 ms
9a3ca65+dirty	344.96 ms	358.92 ms	13.96 ms
acadc0f+dirty	259.04 ms	304.67 ms	45.63 ms
e5c9b8b+dirty	335.40 ms	360.06 ms	24.67 ms
34aba08+dirty	331.79 ms	376.69 ms	44.91 ms
5571a20+dirty	359.52 ms	389.80 ms	30.28 ms
0db0c72+dirty	335.20 ms	351.06 ms	15.86 ms
e73f4ed+dirty	262.98 ms	311.02 ms	48.04 ms

App size

Revision	Plain	With Sentry	Diff
e2b64fe+dirty	7.15 MiB	8.07 MiB	947.16 KiB
9c48b2c+dirty	7.15 MiB	8.07 MiB	947.16 KiB
22e31b6+dirty	7.15 MiB	8.10 MiB	981.29 KiB
9a3ca65+dirty	7.15 MiB	8.09 MiB	962.83 KiB
acadc0f+dirty	7.15 MiB	8.03 MiB	903.20 KiB
e5c9b8b+dirty	7.15 MiB	8.10 MiB	980.41 KiB
34aba08+dirty	7.15 MiB	8.07 MiB	946.13 KiB
5571a20+dirty	7.15 MiB	8.20 MiB	1.05 MiB
0db0c72+dirty	7.15 MiB	8.04 MiB	911.02 KiB
e73f4ed+dirty	7.15 MiB	8.09 MiB	965.94 KiB

[github-actions]

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1220.02 ms	1222.57 ms	2.55 ms
Size	2.36 MiB	2.92 MiB	570.04 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
0db0c72+dirty	1275.02 ms	1285.84 ms	10.82 ms
9433f35+dirty	1246.94 ms	1271.45 ms	24.52 ms
76d1baf+dirty	1244.10 ms	1268.52 ms	24.42 ms
e2b64fe+dirty	1232.22 ms	1255.20 ms	22.98 ms
8900e1a+dirty	1210.27 ms	1218.66 ms	8.39 ms
e73f4ed+dirty	1243.27 ms	1244.52 ms	1.25 ms
3853f43+dirty	1221.82 ms	1242.64 ms	20.82 ms
27ef4ee+dirty	1293.52 ms	1296.08 ms	2.56 ms
d7401ac+dirty	1252.38 ms	1275.04 ms	22.66 ms
22e31b6+dirty	1253.62 ms	1265.96 ms	12.34 ms

App size

Revision	Plain	With Sentry	Diff
0db0c72+dirty	2.36 MiB	2.84 MiB	487.01 KiB
9433f35+dirty	2.36 MiB	2.85 MiB	499.80 KiB
76d1baf+dirty	2.36 MiB	2.82 MiB	469.45 KiB
e2b64fe+dirty	2.36 MiB	2.85 MiB	495.80 KiB
8900e1a+dirty	2.36 MiB	2.83 MiB	479.25 KiB
e73f4ed+dirty	2.36 MiB	2.82 MiB	469.44 KiB
3853f43+dirty	2.36 MiB	2.85 MiB	499.81 KiB
27ef4ee+dirty	2.36 MiB	2.85 MiB	500.03 KiB
d7401ac+dirty	2.36 MiB	2.83 MiB	481.14 KiB
22e31b6+dirty	2.36 MiB	2.87 MiB	520.67 KiB

[github-actions]

iOS (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1229.15 ms	1241.15 ms	12.00 ms
Size	2.92 MiB	3.48 MiB	575.63 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
0db0c72+dirty	1258.88 ms	1262.52 ms	3.64 ms
9433f35+dirty	1232.24 ms	1232.74 ms	0.50 ms
76d1baf+dirty	1245.00 ms	1257.76 ms	12.76 ms
e2b64fe+dirty	1285.78 ms	1297.56 ms	11.78 ms
8900e1a+dirty	1268.36 ms	1273.04 ms	4.68 ms
e73f4ed+dirty	1282.90 ms	1309.30 ms	26.40 ms
3853f43+dirty	1271.74 ms	1278.04 ms	6.30 ms
27ef4ee+dirty	1236.41 ms	1244.90 ms	8.49 ms
d7401ac+dirty	1288.10 ms	1289.54 ms	1.44 ms
22e31b6+dirty	1276.55 ms	1278.12 ms	1.57 ms

App size

Revision	Plain	With Sentry	Diff
0db0c72+dirty	2.92 MiB	3.40 MiB	492.71 KiB
9433f35+dirty	2.92 MiB	3.41 MiB	503.55 KiB
76d1baf+dirty	2.92 MiB	3.38 MiB	475.74 KiB
e2b64fe+dirty	2.92 MiB	3.41 MiB	499.97 KiB
8900e1a+dirty	2.92 MiB	3.39 MiB	485.96 KiB
e73f4ed+dirty	2.92 MiB	3.38 MiB	475.71 KiB
3853f43+dirty	2.92 MiB	3.41 MiB	503.54 KiB
27ef4ee+dirty	2.92 MiB	3.41 MiB	503.72 KiB
d7401ac+dirty	2.92 MiB	3.40 MiB	488.06 KiB
22e31b6+dirty	2.92 MiB	3.43 MiB	524.74 KiB

[lucas-zimerman]

Need to run prettier on stalltracking.test.ts but other than that LGTM!