MGS 3.0.2 — SNEAK STEALTH MIX

Selected stealth specialists retain invisibility while sneaking, grounded, and stationary, while crawl remains the dedicated full low-profile posture.

Crouch stealth additions: Solid Snake, Venom Snake, Quiet, The End, Sniper Wolf.
Existing crouch stealth retained: Old Snake, Gray Fox, Decoy Octopus.

Sniper damage bonuses remain crawl-gated; sneak invisibility does not grant the crawl sniper bonus.
