Add Visione backend foundation

common/Auth.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <drogon/HttpRequest.h>
+
+#include <optional>
+#include <string>
+
+namespace visione::auth
+{
+struct UserContext
+{
+    long long id{0};
+    std::string email;
+    std::string role;
+};
+
+std::optional<std::string> bearerToken(const drogon::HttpRequestPtr &request);
+std::optional<UserContext> authenticate(const drogon::HttpRequestPtr &request);
+bool hasRole(const UserContext &user, const std::string &role);
+bool canManageReports(const UserContext &user);
+bool isAdmin(const UserContext &user);
+}  // namespace visione::auth
+