chore(deps): update pnpm to v9.15.9 (#737)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -57,7 +57,7 @@
         "typescript-eslint": "^8.46.1",
         "zod": "^4.1.12"
     },
-    "packageManager": "pnpm@9.4.0",
+    "packageManager": "pnpm@9.15.9",
     "engines": {
         "node": "22.x"
     },