fix(auth): add /api/readyz to auth middleware bypass list (GRO-2692)

/api/readyz is a public monitoring endpoint like /api/health.
app.basePath("/api") + api.use("*", authMiddleware) applies to all
/api/* paths regardless of route registration order (GRO-2692 UAT
failure: Hono basePath middleware bypass).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/middleware/auth.ts

@@ -23,7 +23,7 @@ if (process.env.AUTH_DISABLED === "true") {
 }
 
 export const authMiddleware: MiddlewareHandler = async (c, next) => {
-  if (c.req.path.startsWith("/api/auth/") || c.req.path === "/api/health") {
+  if (c.req.path.startsWith("/api/auth/") || c.req.path === "/api/health" || c.req.path === "/api/readyz") {
     await next();
     return;
   }