## Why
The deployer identities cannot enable the `oidc` auth mount: `POST /v1/sys/auth/oidc` returns 403 because `sys/auth/<path>` (and its `/tune`) is sudo-protected, and `policies/sys/auth/admin.yaml` granted create/update/delete/read/list without `sudo`.
## How
- Add exact-path rules for `sys/auth/oidc` and `sys/auth/oidc/tune` to `policies/sys/auth/admin.yaml` with the wildcard's capability set plus `sudo` (exact match wins over the glob, so the set is repeated in full); auth block unchanged.
Merge order: apply this, then re-run the master apply so `module.auth_oidc_backend["oidc"]` can create the mount.
Reviewed-on: #149
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
- migrate from individual terraform files to config-driven terragrunt module structure
- add vault_cluster module with config discovery system
- replace individual .tf files with centralized config.hcl
- restructure auth and secret backends as configurable modules
- move auth roles and secret backends to yaml-based configuration
- convert policies from .hcl to .yaml format, add rules/auth definition
- add pre-commit hooks for yaml formatting and file cleanup
- add terragrunt cache to gitignore
- update makefile with terragrunt commands and format target