chore: align @types/node to the Node 24 major (^24.12.4)

The project targets Node 24 (engines node>=24, runtime v24.13). @types/node
tracks the Node major, so ^25 exposed Node-25-only APIs that would type-check
but not exist at runtime. Pin to the latest 24.x. typecheck/lint/test/build green.

Author: awdr74100

package.json

@@ -30,7 +30,7 @@
     "typecheck": "pnpm -r run typecheck"
   },
   "devDependencies": {
-    "@types/node": "^25.9.0",
+    "@types/node": "^24.12.4",
     "@vitest/coverage-v8": "^4.1.6",
     "knip": "^6.14.1",
     "lefthook": "^2.1.8",