docs: identify the 0.10 source candidate

Keep hosted-state claims separate from the locally verified kernel.

Co-Authored-By: Codex <noreply@openai.com>

Author: hihihhi

README.md

@@ -4,6 +4,8 @@ QRAE is a local-first, human-gated quantitative research operating system. The r
 
 ## Current truth
 
+Source release candidate: `0.10.0`. Verify any hosted surface separately; a deployment timestamp or endpoint response never proves that the local research kernel ran.
+
 Implemented and tested:
 
 - strict, hash-bound research work orders;