Why: The user approved adding source processing and timely ambiguity clarification to the goal.
Evidence: Stage-two amendment SHA256 2627342f7d6e94137d5e7418d995ce57218093f6512f67fb7b221f01067da04d and chat approval call_aea78d4156fe4ca89f4b9b6883b2b23f; document hashes and 158 local links checked.
Impact: Add two unapproved stage-three requirement IDs without changing the original 28 or authorizing the public observation implementation.
Refs: TT-N03 and TT-R01; stage 3 amendment r1
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