feat: add better auth sqlite runtime and server-side session flow

server/auth/types.ts

@@ -0,0 +1,13 @@
+export const userRoles = ["freelancer", "client"] as const;
+
+export type UserRole = (typeof userRoles)[number];
+
+export type SetupStatus = "pending" | "completed";
+
+export type AuthAuditEventType =
+  | "setup_started"
+  | "setup_completed"
+  | "login_succeeded"
+  | "login_failed"
+  | "logout_succeeded";
+