Why: establish the authorized task workspace and its initial baseline.
Evidence: preserved precheck receipt in .task/feature-pin-backend-read-consumption.md; R0=1dece88ab0eb6bbeab0ddfb4c7c57c2a7752d248.
Impact: task metadata only; the feature workspace starts at 1dece88ab0.
Refs: .task/feature-pin-backend-read-consumption.md