tatara-render 0.2.4

Env → IaC-platform-shaped manifests. The RENDER phase (THEORY §IV.3) of the eight-phase convergence loop. Each `Backend` impl is a morphism from the typescape (typed Rust resources in `tatara-env::Env`) to a target's native shape (Kubernetes CR YAML, Helm template, Terraform JSON, Pangea Ruby DSL). Adding a backend inherits every existing proof — proofs attach to the typescape types, not to the rendering code (THEORY §III.2).