Add a prek check that validates version consistency across the places container versions are declared: `container.py` VERSION constants, Dockerfile ARGs, `service-versions.yaml`, and nix derivations. The check enforces they agree.
Discovered during analysis of [[adopt-commit-based-container-tags]]: the new commit-SHA-based image tags need a reliable version source (`vX.Y.Z-<sha>`). Versions are currently scattered across Dockerfile ARGs (varying naming conventions), `service-versions.yaml` entries (many still `null`), and nix derivations (implicit from nixpkgs). A sync check ensures these stay consistent without adding a redundant fourth source.
## What Was Done
### 1. Created `mise run container-version-check` task
Scoping: by default only checks containers changed vs main. `--all-files` checks everything. If `service-versions.yaml` itself changed, all containers are checked.
Filled in `current-version` for all hybrid services: navidrome (v0.60.3), miniflux (2.2.17), teslamate (v2.2.0), transmission (4.0.6-r4), kiwix (3.8.1), forgejo-runner (0.19.11). Added authentik (2025.10.1) as a new hybrid entry.
### ntfy nix version skew (resolved)
The check discovered that ntfy's Dockerfile pins v2.17.0 but nixpkgs has ntfy-sh 2.15.0. This was resolved in [[fix-ntfy-nix-version]] by building a custom nix derivation from the forge mirror. The version check now extracts the version from local nix files via regex, falling back to Dagger for unmodified nixpkgs packages.