Why: The approved work-source requirements need a governed path from real messages, retrieved material, and analysis into project evidence and timely clarification.
Evidence: Stage-three amendment SHA256 552a9fdea996bb547c185949b5072a51efafdce1339a9eaafd49537dfedd91b4 and user approval call_b517d0f07af54aa188a01ddb100485b9; independent Backend and RDM scoped design reviews closed the identified privacy, timing, and atomicity gaps; document hashes and links checked.
Impact: Save an unapproved stage-four design only; no new public interface, migration, model run, or product behavior.
Refs: TT-N03, TT-R01; work observation and risk design r1
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