feat(storage): encrypted areas layer (home, system, data/<id>) over any FS; locked until key; plaintext refused; tamper/truncation detected; tests on memory + real ext4

crates/servers/storage-server/src/lib.rs

@@ -4,6 +4,7 @@
 extern crate alloc;
 
 pub mod adapters;
+pub mod encrypted;
 pub mod filesystem;
 pub mod fs;
 pub mod grants;