{"query":"test","elapsed_ms":31,"resolution":"would_fall_through_to_llm_pass_1","trade":{"value":null,"matched_keyword":null,"pattern_group":null},"city":{"value":null,"matched_keyword":null,"pattern_group":null},"multi_trade":{"cats":null,"matched_phrase":null,"pattern":null},"pipeline_note":"Pass 0 regex missed. /api/ai/chat would route this to the Pass 1 LLM classifier (~900ms typical)."}