Configure the arrstack Vault secrets engine (backend config + roles) from
terraform-vault, matching the schema declared in terraform-vault #127.
- Add terraform-plugin-framework provider (local name arrstack) authenticating
to Vault/OpenBao via address + token (VAULT_ADDR/VAULT_TOKEN fallback).
- Add arrstack_secret_backend resource: mounts the engine and writes <mount>/config.
- Add arrstack_secret_backend_role resource: manages <mount>/roles/<name>.
- Add Vault client, conversions, unit tests, Makefile, woodpecker CI + tag
release to artifactapi terraform-unkin, examples, and README.
unkin-agent