[FEATURE] Add builds for `linux-arm64`

Feature Description

Add builds for linux-arm64.

Problem Statement

linux-arm64 is needed when running Docker containers on M* Macs.

Proposed Solution

Supported platforms: darwin-arm64, darwin-x64, linux-arm64, linux-x64, win32-x64

Checklist

• This feature aligns with Memvid's goals (portable, single-file AI memory)
• I have searched existing issues/discussions for similar requests
• I am willing to help implement this feature