Retrieves public civil-complaint statistics and top petition categories from the e-People (국민신문고) portal. Input: period filter; output: complaint counts and leading grievance types.
curl -X POST "https://apitree.ai/api/v1/proxy/kr-epeople-petition-stats" \
-H "Authorization: Bearer nxs_live_YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"reqLang":"<reqLang>"}'