c8ab90d01d
git-gate holds an SSH IdentityFile for push/fetch; cred-proxy holds a PAT for HTTPS REST API calls. The two brokers are orthogonal — the common dev setup names both on the same host (e.g. gitea.dideric.is SSH for push, gitea.dideric.is PAT for `tea pr create`). The original PRD 0010 wording called this a "configuration smell" and rejected it at parse time. That was wrong; this drops the overlap rejection from the validator and updates the PRD prose to match. Tests flip from "rejection" to "coexistence" assertions.