Revert changes to audit module.

Author: tmpfs

crates/backend/src/audit.rs

@@ -10,30 +10,16 @@ pub type AuditProvider =
 
 type AuditProviders = Vec<AuditProvider>;
 
-static mut PROVIDERS: OnceLock<AuditProviders> = OnceLock::new();
+static PROVIDERS: OnceLock<AuditProviders> = OnceLock::new();
 
 /// Initialize audit trail providers.
 pub fn init_providers(providers: AuditProviders) {
-    unsafe {
-        PROVIDERS.get_or_init(|| providers);
-    }
-}
-
-/// Update audit trail providers.
-///
-/// # Panics
-///
-/// If the audit trail providers have not already been set.
-pub fn update_providers(providers: AuditProviders) {
-    unsafe {
-        let audit_providers = PROVIDERS.get_mut().unwrap();
-        *audit_providers = providers;
-    }
+    PROVIDERS.get_or_init(|| providers);
 }
 
 /// Configured audit providers.
 pub fn providers<'a>() -> Option<&'a AuditProviders> {
-    unsafe { PROVIDERS.get() }
+    PROVIDERS.get()
 }
 
 /// Append audit events to all configured providers.

crates/backend/src/lib.rs

@@ -1,4 +1,5 @@
 #![deny(missing_docs)]
+#![forbid(unsafe_code)]
 #![cfg_attr(all(doc, CHANNEL_NIGHTLY), feature(doc_auto_cfg))]
 //! Backend database and file system storage.
 mod access_point;