2.2.12-alpha

Fixes Gravity Well instantly defeating bosses as they enter Boss Rush.

• Normal and charged Gravity Well now protect the boss itself throughout its entrance. Ordinary enemies and boss-owned minions retain their existing Gravity Well behavior.
• Invalid boss captures from older snapshots are released safely.
• Added regression coverage for all eight bosses in both seats, normal and charged casts, and deterministic replay.

Also adds an X3 Zero saber diagnostic benchmark. Campaign and Boss Rush tests in solo and local co-op compared logging enabled and disabled, including the normal charge/two-buster/saber sequence. A consistent saber-specific slowdown was not reproduced, so this release does not claim a saber performance fix.

Validated on Windows and Linux: 25 tests passed per platform, with two donor-asset render/wave tests skipped. All 32 normal/charged Gravity Well boss-entrance cases pass on both platforms. Packaged ROM startup was checked from accented folder names; the Windows ZIP was also checked with development tools removed from PATH. Linux package layout and ROM-picker checks pass.

Download the Windows ZIP or Linux x86_64 AppImage below. Both players should update before starting a new netplay session.

Changes: #131