Add Linux ARM64 GNU fallback support for Android ARM64

[JasoonS]

Summary

This PR adds fallback support for loading Linux ARM64 GNU native binaries on Android ARM64 platforms. Since Android is Linux-based under the hood, the Linux ARM64 GNU binary can serve as a fallback when Android-specific binaries are not available.

Key Changes

• Added a comment clarifying the Android-specific binary loading strategy in index.js
• Implemented fallback logic to attempt loading the Linux ARM64 GNU binary (hypersync-client.linux-arm64-gnu.node) on Android ARM64 platforms
• Added fallback to load the @envio-dev/hypersync-client-linux-arm64-gnu npm package with version validation (expects version 1.1.0)
• Updated npm/linux-arm64-gnu/package.json to declare support for both linux and android operating systems

Implementation Details

• The fallback attempts are made after trying Android-specific binaries, maintaining the preference for platform-specific implementations
• Version checking is enforced via the NAPI_RS_ENFORCE_VERSION_CHECK environment variable to ensure compatibility
• All load attempts are wrapped in try-catch blocks with errors collected for debugging purposes

https://claude.ai/code/session_015zso6wY1hJMst67LiXp4LW

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