sdk

commit 9d235779fced49125aa1095c71bd03a6a35a1e3b
parent 9eb15b2dec368a65401ed278fa3ffc8b9a2d71f4
Author: triesap <tyson@radroots.org>
Date:   Fri, 19 Jun 2026 04:00:29 -0700

docs: align local runtime API guidance

- document RadrootsSdk as the product runtime entrypoint
- remove stale client and config facade guidance
- clarify relay-client as SDK-owned runtime support
- record the pre-payment order capability boundary