Convert SentryCrashIntegration to Swift (#7187)

* ref: Migrate SentryWatchdogTerminationLogic and SentryWatchdogTerminationTracker to Swift

Migrate the Logic and Tracker classes from Objective-C to Swift while keeping
the Integration in Objective-C for now. The Swift classes are marked with @objc
and @_spi(Private) to maintain compatibility with the existing Objective-C Integration.

Changes:
- Add SentryWatchdogTerminationLogic.swift with @objc support
- Add SentryWatchdogTerminationTracker.swift with @objc support
- Remove old Objective-C implementations
- Update imports in Integration and other files to use Swift versions
- Update test data to reference Swift class properties
- Update bridging header to remove obsolete imports

* Fix missing imports

* Fix build on macOS

* ref: Migrate SentryWatchdogTerminationTrackingIntegration to Swift

Migrate the Integration class from Objective-C to Swift, building on top of the
previously migrated Logic and Tracker Swift classes. The Swift Integration uses
a protocol-based dependency injection pattern for better testability.

Changes:
- Add SentryWatchdogTerminationTrackingIntegration.swift with generics
- Remove old Objective-C Integration implementation
- Update Integrations.swift to register the Swift integration
- Update SentrySDKInternal.m to remove ObjC registration
- Update Integration tests to work with new Swift implementation

* ref: Update SentryScope observer API for Swift compatibility

Update the scope observer API to be more Swift-friendly. Rename addObserver to
addScopeObserver and make it accept Any type with runtime validation, allowing
Swift-defined protocols to work properly with Objective-C.

Changes:
- Rename addObserver: to addScopeObserver: in SentryScope
- Update addScopeObserver to accept Any with runtime protocol checking
- Remove addObserver from SentryScope+Private.h header
- Add addScopeObserver to SentryScope+PrivateSwift.h
- Update SentryCrashIntegration to use new API
- Update tests to cast observer to Any when needed
- Update Xcode project to include Integration Swift file

* Fix tests

* Break down `WatchdogTerminationTrackingProvider`

* Add tests for `SentryWatchdogTerminationLogic`

* Add SentryWatchdogTerminationLogicTests to project configuration

* Rename SentryWatchdogTerminationTracker constants

* Refactor SentryWatchdogTerminationTracker to remove nesting

* Extract WatchdogTermination contansts

* Remove conditional compilation for iOS-specific tests in SentryClientTests, SentryMetricKitEventTests, and TestData. This simplifies the test files by eliminating unnecessary preprocessor directives.

* Convert SentryCrashIntegration from Objective-C to Swift

- Create SentryCrashIntegration.swift with SwiftIntegration protocol
- Implement dependency injection via CrashIntegrationProvider
- Handle C callback for crash-time transaction saving
- Remove old Objective-C files (SentryCrashIntegration.m/h)
- Update SentrySDKInternal.m to remove ObjC integration reference
- Register integration in Swift integration installer
- Expose required ObjC headers in SentryPrivate.h
- Update all tests to use new Swift initialization API
- Add MIGRATION_NOTES.md documenting remaining work

Note: Requires SentryWatchdogTerminationLogic, SentryCrashIntegrationSessionHandler,
and SentryCrashScopeObserver to be properly bridged to Swift or migrated.

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

* Fix build on watchos and macOS

* Update conditional compilation to include visionOS support in SentryWatchdogTerminationTrackingIntegration.swift

* Add SentryWatchdogTerminationTrackingIntegration to Integrations.swift

* Fix compilation issues after merging watchdog branch

- Remove SentryCrashIntegration.h import from SentryClient.m
- Remove SentryCrashIntegration headers from SentryTests-Bridging-Header.h
- Remove SentryWatchdogTerminationLogic.h from SentryPrivate.h (now in Swift)
- Fix Scope casting to access private ObjC methods

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

* Remove duplicate AppStateManagerProvider protocol

The protocol is already defined in SentryDependencyContainer.swift
from the watchdog termination branch merge.

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

* ref: Renames `SentrySpan` class to `SentrySpanInternal`

* chore: Add temporary macro for Swift migration tracking in SentryDefines.h

* Add Objective-C id usage linter

* Remove excluded folder and fix SentryScope.h

* Rewrite script in ruby

* Improve script

* Refactor violation reporting in check-objc-id-usage.rb to allow for quiet mode

* Refactor SentryCrashIntegration and migrate to Swift. Removed Objective-C implementation of SentryCrashInstallationReporter and SentryCrashIntegrationSessionHandler, replacing them with Swift counterparts. Updated project file references accordingly.

* Undo unnecessary changes

* Fix tests

* Undo change

* Cleanup

* Remove unnecessary uninstall

* Improve SentruCrashIntegrationTests

* Fix build in SPM

* Conditional import of "SentryUncaughtNSExceptions.h" for macOS target in SentryPrivate.h

* Run generate API

* Fix UIKit linking

* Add some comments regarding why use a singleton

* Refactor SentryCrashIntegration to use NSRecursiveLock for thread safety and improve installation token handling. Update crash handler initialization logic and enhance comments for clarity.

* Update Sources/Sentry/include/SentryPrivate.h

* Add debug logging for transaction handling and crash handler initialization in SentryCrashIntegration

* Refactor SentryCrashIntegration to eliminate singleton use

* Move builder methods to the dependency container

* Refactor SentryCrashIntegration to remove dispatch queue wrapper dependency and simplify installation handling. Update tests to reflect changes in mock dependencies.

* Fix test for macOS

---------

Co-authored-by: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

Author: itaybre

Sentry.xcodeproj/project.pbxproj

@@ -3,7 +3,6 @@
 #import "SentryAttachment.h"
 #import "SentryClient+Private.h"
 #import "SentryCrashDefaultMachineContextWrapper.h"
-#import "SentryCrashIntegration.h"
 #import "SentryCrashStackEntryMapper.h"
 #import "SentryDefaultThreadInspector.h"
 #import "SentryDeviceContextKeys.h"