Always targets the production environment for Cloudflare deployments

Craft Cloudflare Pages releases always deploy to production by passing productionBranch (default main) as wrangler pages deploy --branch <productionBranch>. Chose explicit --branch over omitting it because Wrangler infers Git context and Craft's temporary directory can select a preview; Wrangler has no equivalent --production or --environment flag. This Cloudflare branch is an environment selector, not Craft's Git release branch; any other branch creates a preview deployment.