fix(lint): update Node.js import protocol and biome schema version

Author: texture-coding-agent

app/api/tiles/substations/[z]/[x]/[y]/route.ts

@@ -10,8 +10,8 @@
  * - Future: regenerate tiles on sync completion via CI
  */
 
-import { readFile } from "fs/promises";
-import { join } from "path";
+import { readFile } from "node:fs/promises";
+import { join } from "node:path";
 
 export async function GET(
   req: Request,

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.4.2/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.4.13/schema.json",
   "files": {
     "includes": [
       "**/*.ts",