Update documentation and routes to remove /v1 prefix

- Update all route documentation comments
- Update README, env.example, and starter-docs
- Update install.sh

starter-docs/full_overview.md

@@ -149,7 +149,7 @@ Each rollup stores:
 
 ## Metadata (NUT‑06)
 
-- Fetched from `/v1/info`
+- Fetched from `/info`
 - Only fetched after a successful probe
 - Fetched at most once per hour per mint
 - Stored as a current snapshot