Get Api Trending Tickers

2026-08-25 (AJ: "咁FREE KEY比人用，我接到數據訓ENGINE或儲存之類嗎"): the honest answer at the time was "no signal at all" -- intelligence_api_ usage only ever counted raw call volume. services/intelligence_quota_ service.py's log_query()/get_trending_tickers() close that gap with a lightweight, aggregate-only query log (endpoint+ticker+timestamp, never the response payload) -- this is the admin-facing read of it. Answers "what are developers actually asking the API about" (a product signal on which tickers/features to prioritize), not "was the model right" (that requires the Prediction Ledger's own internal grading loop, a different question this endpoint deliberately doesn't claim to answer).