Add substance_use + privacy_confidentiality routes, affirm-with-question detection

V4.2 part 2: authority-misconduct route + conversation history in rephraser

V4.2 part 1: fix broken ISSS URL, ship URL audit + Karthik data brief

V4: streaming, controlled paraphrasing, support plan, voice, sweeps

Add stage-aware listening planner and F-1 student awareness

Prepare Core dataset intake and resource registry

Implement EmpathRAG Core hybrid router

Start V2.5 support navigator hardening

Add curated corpus integration scaffold

Day 3: correct gitignore, add data manifest