[Internal] Swift Lock Improvements

[stevensJourney]

Overview

Related to powersync-ja/powersync-swift#69.

This removes some of the Swift specific error handling we perform in the core module, by adding some additional helpers to the PowerSyncKotlin module.

A small Result like interface is added to the Swift module in order for the Swift SDK to relay exceptions to the Kotlin codebase (throwing Errors directly on the Swift side is not a trivial exercise).

[Copilot]

Pull Request Overview

This PR improves Swift-Kotlin interoperability by removing Swift-specific error handling from the core module and adding helper classes to the PowerSyncKotlin module. The changes enable better exception handling between Swift and Kotlin codebases.

• Removes catchSwiftExceptions wrapper function from the core database implementation
• Adds PowerSyncResult sealed class and wrapper classes for bridging exceptions between Swift and Kotlin
• Updates CHANGELOG to document the internal improvements

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
core/src/commonMain/kotlin/com/powersync/db/internal/InternalDatabaseImpl.kt	Removes Swift-specific exception handling from core database operations
PowerSyncKotlin/src/appleMain/kotlin/com/powersync/SDK.kt	Adds imports for callback and transaction types
PowerSyncKotlin/src/appleMain/kotlin/com/powersync/Locks.kt	Introduces PowerSyncResult and wrapper classes for Swift-Kotlin exception bridging
CHANGELOG.md	Documents the internal Swift lock improvements

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[simolus3]

Looks good to me 👍