fix: update @std/http import path to use JSR format

- Update import path in targeted_response.ts to use jsr:@std/http
- Fix module resolution error

Author: devin-ai-integration[bot]

rest/targeted_response.ts

@@ -1,4 +1,4 @@
-import type { StatusCode, SuccessfulStatus } from "@std/http";
+import type { StatusCode, SuccessfulStatus } from "jsr:@std/http";
 import type { JsonCompatible } from "./json_compatible.ts";
 
 export type { StatusCode, SuccessfulStatus };