To properly support cask distribution, you need to sign your binaries with an Apple Developer certificate. This requires:
Enrolling in the Apple Developer Program ($99/year)
Creating a Developer ID Application certificate
Configuring code signing in your build pipeline
Signing binaries during the GoReleaser build process
Once signing is implemented, you can uncomment the cask configuration and remove the disable! stanza.
Workaround for Users (Temporary)
Users who already installed via cask can bypass Gatekeeper by manually removing the quarantine attribute:
bashxattr -d com.apple.quarantine $(which hookdeck)
This should be documented in troubleshooting guides until proper signing is implemented.