Production environment bootstrap (post-merge from #203)

[lsetiawan]

Context

PR #203 parameterized the infrastructure for multi-environment deployment. The following manual steps are needed to bootstrap the production environment.

Tasks

• Create production GitHub environment in repo settings
• Bootstrap production: DEPLOY_ENV=production pixi run -e deployment cloud-deploy-direct
• Update deploy-production.yml WIF_PROVIDER placeholder with real value from cloud-outputs
• Upload production secrets (GSheets credentials, USDA API key)
• Run production migrations and seed admin
• Create first GitHub Release to test production CD pipeline