f5f713fe86
Part of #155 (prerequisite for open-webui deployment PR #172). ## Summary - Adds `^open-webui/open-webui` to the `ghcr` remote's `immutable_patterns` in `remote-docker.yaml` so version-pinned open-webui image pulls are cached indefinitely through artifactapi ## Test plan - artifactapi serves `ghcr.io/open-webui/open-webui:<version>` with `X-Artifact-Source: cache` on second fetch Reviewed-on: #173