Scripts like install.sh and install-sensor-proxy.sh are now attached
as release assets and downloaded from releases/latest/download/ URLs.
This ensures users always get scripts compatible with their installed
version, even while development continues on main.
Changes:
- build-release.sh: copy install scripts to release directory
- create-release.yml: upload scripts as release assets
- Updated all documentation and code references to use release URLs
- Scripts reference each other via release URLs for consistency