Drop the password-manager pattern from alknet-vault (drift item #7,
ADR-025, resolves review #002 C9). Site-specific password derivation
is not relevant to an RPC system's vault.
Removed:
- derive_password method from VaultServiceHandle (service.rs)
- derive_password_string method from VaultServiceHandle (service.rs)
- site_password_path function from derivation.rs
- site-password derivation path row from derivation.rs doc table
- All password-derivation tests from service.rs and derivation.rs
- Now-unused base64 URL_SAFE_NO_PAD import from service.rs
glm-5.2
06b715322a