Mescla a main (lzfse_rust e ed25519-compact lado a lado)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/guara-core/Cargo.toml

@@ -30,6 +30,7 @@ pbkdf2 = { version = "0.13", default-features = false, features = ["hmac"] }
 ripemd = "0.2"
 argon2 = "0.6"
 ed25519-compact = { version = "2", default-features = false, features = ["random", "std"] }
+lzfse_rust = "0.2.1"
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2"