Complete procedures with a way back.

Design a real module contract, keep provider and backend ownership in environment roots, pin releases, protect sensitive state in versioned encrypted S3 storage, use Terraform 1.15 native lockfiles, and rehearse upgrades and recovery.

Design, deploy and prove an Amazon S3 backup target with explicit object ownership, public-access blocking, SSE-KMS, version history, lifecycle controls, least-privilege roles, optional immutable retention and independent restore evidence.