feat: integrate diagnostics client

[sojingle]

Summary

• Integrate diagnostics client
• Add crash catcher

Checklist

• Does your PR title have the correct title format?
• Does your PR have a breaking change?: no

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Note

Integrates diagnostics across the SDK, adds a NoUIKit variant, updates core dependency, and refreshes autocapture/remote-config, tests/CI, and build scripts.

• Core/Diagnostics:
  • Wire DiagnosticsClient via Configuration and AmplitudeContext; add enableDiagnostics default and remote client initialization.
  • Emit diagnostics: set SDK version/autocapture tags; count sent/dropped events in PersistentStorageResponseHandler.
  • Add AutocaptureOptions.stringRepresentation() and track enabled autocapture via updateEnabledAutocapture from Remote Config (sessions, app lifecycles, screen/interactions, network).
• Targets/Build:
  • Add Amplitude-Swift-NoUIKit target and Amplitude-Swift-Package-DisableUIKit scheme; enforce no UIKit linkage with shell script.
  • Conditional-import AmplitudeCore vs AmplitudeCoreNoUIKit throughout sources.
  • Update build_framework.sh to build by scheme (incl. NoUIKit).
• Dependencies:
  • Bump AmplitudeCore-Swift to 1.3.1 (SPM and Xcode project).
• CI:
  • Migrate workflows to macos-15, Xcode 16.4, newer OS/device matrices; ObjC example runs on iOS 18.5.
• Network Tracking/Remote Config:
  • Apply remote network tracking config (enable/hosts/rules); stabilize tests; refine URLSession swizzling and FakeURLProtocol filtering.
• Examples:
  • Add Diagnostics actions (Flush/Crash) to SwiftUI example; update example capture option key to allowlist.
• Tests:
  • Add FakeDiagnosticsClient; overhaul Remote Config test harness; adjust expectations/timings and sequencing; numerous test updates to pass new interfaces.

^{Written by Cursor Bugbot for commit bccdc33. Configure here.}

[promptless]

📝 Documentation updates detected!

New suggestion: Document enableDiagnostics configuration option for iOS Swift SDK

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Comment @cursor review or bugbot run to trigger another review on this PR

[sojingle]

bugbot run

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✅ Bugbot reviewed your changes and found no bugs!

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[crleona]

Would it make sense to centralize (at least some of) the autocapture logic? it looks like you're already halfway there with the changes to report which autocapture options are enabled to diagnostics.

[sojingle]

Would it make sense to centralize (at least some of) the autocapture logic?

@crleona sounds good. It’s a bit too scattered right now. I will submit another PR to handle this.

Currently, the UT success rate has improved a lot. There are still some issues, but it’s back within an acceptable range. Next, adding the feature to pass in the identity during init can further boost the success rate.

[promptless]

📝 Documentation updates detected!

Updated existing suggestion: Document enableDiagnostics configuration option for iOS Swift SDK

[crleona]

Currently, the UT success rate has improved a lot. There are still some issues, but it’s back within an acceptable range. Next, adding the feature to pass in the identity during init can further boost the success rate.

nice!