ref: Migrate app state manager to Swift

[philprime]

📜 Description

Migrates the private app-state lifecycle manager from Objective-C into SentryAppStateManager.

The manager now owns lifecycle notification observation and uses a composed dependency-provider interface for its crash reporter, file manager, sysctl wrapper, dispatch queue, and notification center.

💡 Motivation and Context

The Objective-C helper had a single consumer. Inlining its behavior keeps app-state lifecycle logic together while removing the obsolete private Objective-C header and implementation.

💚 How did you test it?

• make format
• make analyze
• make build-ios FOR_AGENTS=true
• make test-ios FOR_AGENTS=true ONLY_TESTING=SentryTests/SentryAppStateManagerTests,SentryTests/SentryAppStartTrackerTests,SentryTests/SentryWatchdogTerminationLogicTests,SentryTests/SentryWatchdogTerminationTrackerTests,SentryTests/SentryWatchdogTerminationIntegrationTests

📝 Checklist

• 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.

Closes #8734

[sentry]

📲 Install Builds

iOS

🔗 App Name	App ID	Version	Configuration
SDK-Size	io.sentry.sample.SDK-Size	9.25.0 (1)	Release

⚙️ sentry-cocoa Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1225.94 ms	1268.29 ms	42.36 ms
Size	24.14 KiB	1.29 MiB	1.27 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
df67624	1225.12 ms	1259.90 ms	34.78 ms
6e35062	1232.19 ms	1262.91 ms	30.73 ms
220d7ef	1238.77 ms	1267.42 ms	28.65 ms
4b5a1d7	1235.27 ms	1264.49 ms	29.22 ms
9319185	1223.24 ms	1249.98 ms	26.73 ms
d0b52d1	1227.31 ms	1258.32 ms	31.01 ms
b6b0d1d	1236.69 ms	1270.22 ms	33.52 ms
5b1c31e	1221.35 ms	1246.14 ms	24.79 ms
9787f05	1233.67 ms	1269.00 ms	35.33 ms
29d1b7f	1220.58 ms	1254.14 ms	33.56 ms

App size

Revision	Plain	With Sentry	Diff
df67624	24.14 KiB	1.14 MiB	1.12 MiB
6e35062	24.14 KiB	1.22 MiB	1.20 MiB
220d7ef	24.14 KiB	1.17 MiB	1.14 MiB
4b5a1d7	24.14 KiB	1.22 MiB	1.20 MiB
9319185	24.14 KiB	1.16 MiB	1.13 MiB
d0b52d1	24.14 KiB	1.15 MiB	1.13 MiB
b6b0d1d	24.14 KiB	1.18 MiB	1.16 MiB
5b1c31e	24.14 KiB	1.24 MiB	1.22 MiB
9787f05	24.14 KiB	1.18 MiB	1.15 MiB
29d1b7f	24.14 KiB	1.26 MiB	1.23 MiB

Previous results on branch: philprime/app-state-manager-conversion

Startup times

Revision	Plain	With Sentry	Diff
8a6f95f	1214.58 ms	1251.44 ms	36.86 ms

App size

Revision	Plain	With Sentry	Diff
8a6f95f	24.14 KiB	1.27 MiB	1.25 MiB

[NinjaLikesCheez]

LGTM, one comment