sdk

commit df357dc03e99dde2a4fe6a24bcb9471358f52b06
parent 6e3552ddca05e061bc4519b08e86edf1b069c77a
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