test: isolate shake detector cooldown

[supervacuus]

📜 Description

• add a test-only reset for SentryShakeDetector's process-wide cooldown state
• reset the cooldown before and after each SentryShakeDetectorTests test
• prevent shake events from one test suppressing events in a subsequent test

💡 Motivation and Context

SentryShakeDetectorTests.testEnable_whenShakeOccurs_shouldPostNotification can fail depending on test order and timing. A shake from the preceding test updates the process-wide lastShakeTimestamp, and disable() does not reset it. If the next shake occurs within the one-second cooldown, its notification is suppressed.

This was observed in a CI run for #8589.

Resetting the cooldown in disable() itself may be reasonable because re-enabling could be considered a new detection session. However, doing so would change production behavior by allowing a shake immediately after a disable/re-enable cycle, which could make sense, but I am not sure whether separating the life-cycle from the cooldown wasn't intentional. If it wasn't, I am happy to integrate it into disable() instead.

💚 How did you test it?

I only ran the affected tests to check that nothing broke there. No production code was modified (yet, see above).

📝 Checklist

You have to check all boxes before merging:

• 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.
• I updated the wizard 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.
• Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.
• If I added a new public API, I also added it to the SentryObjC wrapper.

[sentry]

📲 Install Builds

iOS

🔗 App Name	App ID	Version	Configuration
SDK-Size	io.sentry.sample.SDK-Size	9.24.0 (1)	Release

⚙️ sentry-cocoa Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1203.07 ms	1236.90 ms	33.83 ms
Size	24.14 KiB	1.25 MiB	1.23 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
2fe9650	1228.33 ms	1260.78 ms	32.46 ms
a8fc1c8	1226.83 ms	1248.19 ms	21.36 ms
27850be	1222.65 ms	1254.23 ms	31.58 ms
241d6ee	1228.92 ms	1258.47 ms	29.55 ms
6307f8b	1216.23 ms	1247.74 ms	31.52 ms
66415de	1221.21 ms	1253.28 ms	32.07 ms
62cb5fd	1219.45 ms	1250.56 ms	31.11 ms
c4d02bd	1219.63 ms	1248.68 ms	29.05 ms
8bb6aeb	1232.15 ms	1260.78 ms	28.63 ms
dff20e3	1225.19 ms	1258.66 ms	33.47 ms

App size

Revision	Plain	With Sentry	Diff
2fe9650	24.14 KiB	1.17 MiB	1.15 MiB
a8fc1c8	24.14 KiB	1.23 MiB	1.20 MiB
27850be	24.14 KiB	1.18 MiB	1.16 MiB
241d6ee	24.14 KiB	1.24 MiB	1.22 MiB
6307f8b	24.14 KiB	1.23 MiB	1.20 MiB
66415de	24.14 KiB	1.16 MiB	1.13 MiB
62cb5fd	24.14 KiB	1.22 MiB	1.20 MiB
c4d02bd	24.14 KiB	1.17 MiB	1.14 MiB
8bb6aeb	24.14 KiB	1.17 MiB	1.15 MiB
dff20e3	24.14 KiB	1.15 MiB	1.13 MiB

Previous results on branch: test/isolate_shake_detector_cooldown

Startup times

Revision	Plain	With Sentry	Diff
2a8c954	1221.54 ms	1266.57 ms	45.02 ms

App size

Revision	Plain	With Sentry	Diff
2a8c954	24.14 KiB	1.26 MiB	1.23 MiB

[itaybre]

LGTM