Plan and execute tdmcp feature campaigns

Scout ONE surface for new tdmcp feature candidates

Find gaps on one surface without cross-contaminating scope with other surveyors

• · surface assignment
• · current code inventory
• · ROADMAP.md

• · _workspace/discovery/01_survey_<surface>.md

• · surface assignment is clear
• · surveyor stays inside exactly one surface boundary

• · candidate scope creeps into another surface

• · inventories what already exists before proposing new
• · labels novelty (NEW/ROADMAP/EXTENSION)