Release checklist: v0.4.2

[simolus3]

This is a checklist to track the release of v0.4.2.

Changes:

• Allow static strings in SQLiteError #95
• Adopt structured error type #96
• Recover from some errors within sync iteration #97
• Ignore unknown sync lines #98
• Check formatting in CI #99
• Build with NDK 28 or newer for 16KB page alignment #101

Core build (this repo):

• Release PR: Prepare 0.4.2 release #102
• GitHub Release
• Android aar released on Maven Central
• Cocoapod released

SQLite + powersync bundles:

• react-native-quick-sqlite: Update PowerSync core extension to 0.4.2 react-native-quick-sqlite#88
• wa-sqlite build: Update powersync core extension to 0.4.2 wa-sqlite#41

User-facing SDK updates:

• powersync.dart: Update core extension to 0.4.2 powersync.dart#302
• powersync-js: Update core extension to 0.4.2 powersync-js#656
• kotlin: Update PowerSync core extension to 0.4.2 powersync-kotlin#216
• swift: Update core extension to 0.4.2 powersync-swift#55