feat: add RBAC (read/write/admin) and persistent audit log

- Add Role enum to tokens: Read, Write, Admin (default: Read)
- Enforce role-based access in auth middleware (read-only tokens blocked from PUT/POST/DELETE)
- Add role field to token create/list/verify API
- Add persistent audit log (append-only JSONL) for all registry operations
- Audit logging across all registries: docker, npm, maven, pypi, cargo, raw

DevITWay

nora-registry/src/audit.rs

@@ -0,0 +1,77 @@
+// Copyright (c) 2026 Volkov Pavel | DevITWay
+// SPDX-License-Identifier: MIT
+
+//! Persistent audit log — append-only JSONL file
+//!
+//! Records who/when/what for every registry operation.
+//! File: {storage_path}/audit.jsonl
+
+use chrono::{DateTime, Utc};
+use parking_lot::Mutex;
+use serde::Serialize;
+use std::fs::{self, OpenOptions};
+use std::io::Write;
+use std::path::PathBuf;
+use tracing::{info, warn};
+
+#[derive(Debug, Clone, Serialize)]
+pub struct AuditEntry {
+    pub ts: DateTime<Utc>,
+    pub action: String,
+    pub actor: String,
+    pub artifact: String,
+    pub registry: String,
+    pub detail: String,
+}
+
+impl AuditEntry {
+    pub fn new(action: &str, actor: &str, artifact: &str, registry: &str, detail: &str) -> Self {
+        Self {
+            ts: Utc::now(),
+            action: action.to_string(),
+            actor: actor.to_string(),
+            artifact: artifact.to_string(),
+            registry: registry.to_string(),
+            detail: detail.to_string(),
+        }
+    }
+}
+
+pub struct AuditLog {
+    path: PathBuf,
+    writer: Mutex<Option<fs::File>>,
+}
+
+impl AuditLog {
+    pub fn new(storage_path: &str) -> Self {
+        let path = PathBuf::from(storage_path).join("audit.jsonl");
+        let writer = match OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&path)
+        {
+            Ok(f) => {
+                info!(path = %path.display(), "Audit log initialized");
+                Mutex::new(Some(f))
+            }
+            Err(e) => {
+                warn!(path = %path.display(), error = %e, "Failed to open audit log, auditing disabled");
+                Mutex::new(None)
+            }
+        };
+        Self { path, writer }
+    }
+
+    pub fn log(&self, entry: AuditEntry) {
+        if let Some(ref mut file) = *self.writer.lock() {
+            if let Ok(json) = serde_json::to_string(&entry) {
+                let _ = writeln!(file, "{}", json);
+                let _ = file.flush();
+            }
+        }
+    }
+
+    pub fn path(&self) -> &PathBuf {
+        &self.path
+    }
+}