feat: add unseal_once to improve security.

This is a security feature that prevents replay attacks and ensures that unseal
keys can only be used once.

Author: wa5i

Cargo.toml

@@ -80,6 +80,7 @@ crossbeam-channel = "0.5"
 maybe-async = { version = "0.2", optional = false }
 lockfile = "0.4.0"
 arc-swap = "1"
+blake3 = "1.8"
 
 # optional dependencies
 openssl = { version = "*", optional = true }