docs: add project history (GainForest + Claude Opus 4.5, moved to hypercerts-org)

Author: daviddao

README.md

@@ -212,11 +212,16 @@ make build
 
 Migrations run automatically on startup.
 
+## History
+
+Hyperindex was incubated and created by [GainForest](https://gainforest.earth) and [Claude Opus 4.5](https://www.anthropic.com/claude) (Anthropic), originally under the name *Hypergoat*. It has since been moved to [hypercerts-org](https://github.com/hypercerts-org) for community maintenance.
+
 ## License
 
 Apache License 2.0
 
 ## Acknowledgments
 
+- [GainForest](https://gainforest.earth) & [Claude Opus 4.5](https://www.anthropic.com/claude) - Original creators
 - [Quickslice](https://github.com/quickslice/quickslice) - Original Gleam implementation
 - [AT Protocol](https://atproto.com/) - The underlying protocol