feat: Derandomize the rosenpass protocol by adding testvectors

- Introduced a new module `test_vector_sets.rs` containing test vector definitions for deterministic protocol testing.
- Added a new test file `test_vector_crypto_server.rs` to validate the protocol implementation using captured internal randomness.
- Added serialization and deserialization of `Secret`, `Public`, and `PublicBox` types in `serialization.rs`.
- Added necessary dependencies in `Cargo.toml` for test vectors: assert_tv, serde and base64
- Updated audit records in `audits.toml` and `imports.lock` for new dependencies.

pkgs/rosenpass.nix

@@ -24,6 +24,7 @@ let
       "service"
       "target"
       "toml"
+      "zstd" # used for offloaded test vector values
     ];
     # Files to explicitly include
     files = [ "to/README.md" ];