Rename containers/forgejo-runner to runner-job-image

The forgejo-runner container is the CI job execution environment (Dagger,
ArgoCD CLI, etc.), not the runner daemon itself. Rename to runner-job-image
to fix the version-check false positive (Dagger 0.19.11 vs daemon 12.7.0)
and clarify the distinction.

RUNNER_LABELS still references the old image name — will update after
building the image under the new name.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

containers/forgejo-runner/Dockerfile

@@ -1,78 +0,0 @@
-# Forgejo Actions Job Execution Image
-#
-# This image is used as the job execution environment for Forgejo Actions.
-# The host runner daemon creates containers from this image to run workflow steps.
-#
-# Build logic (container images, docs site) runs inside Dagger containers,
-# so this image only needs: git, Docker CLI, Dagger CLI, ArgoCD CLI, uv, yq, and basic tools.
-#
-# Usage: Configure runner with label like:
-#   docker:docker://registry.ops.eblu.me/blumeops/forgejo-runner:latest
-
-ARG CONTAINER_APP_VERSION=0.19.11
-
-FROM debian:bookworm-slim
-
-ARG TARGETARCH
-ARG CONTAINER_APP_VERSION
-ARG DAGGER_VERSION=${CONTAINER_APP_VERSION}
-
-# Install base dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    ca-certificates \
-    curl \
-    git \
-    gnupg \
-    jq \
-    tzdata \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install Node.js (required by actions/checkout and other JavaScript Actions)
-RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
-    && apt-get install -y --no-install-recommends nodejs \
-    && rm -rf /var/lib/apt/lists/* \
-    && node --version
-
-# Install Docker CLI (Dagger shells out to `docker` to provision its engine)
-RUN install -m 0755 -d /etc/apt/keyrings \
-    && curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc \
-    && chmod a+r /etc/apt/keyrings/docker.asc \
-    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian bookworm stable" > /etc/apt/sources.list.d/docker.list \
-    && apt-get update \
-    && apt-get install -y --no-install-recommends docker-ce-cli \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install uv (Python package runner for towncrier)
-RUN curl -LsSf https://astral.sh/uv/install.sh | sh \
-    && mv /root/.local/bin/uv /usr/local/bin/uv \
-    && mv /root/.local/bin/uvx /usr/local/bin/uvx
-
-# Install argocd CLI (for syncing apps from workflows)
-RUN ARCH="${TARGETARCH:-$(dpkg --print-architecture)}" \
-    && curl -fsSL -o /usr/local/bin/argocd \
-    "https://github.com/argoproj/argo-cd/releases/latest/download/argocd-linux-${ARCH}" \
-    && chmod +x /usr/local/bin/argocd \
-    && argocd version --client
-
-# Install Dagger CLI (for running Dagger CI pipelines)
-RUN ARCH="${TARGETARCH:-$(dpkg --print-architecture)}" \
-    && curl -fsSL -o /tmp/dagger.tar.gz \
-    "https://dl.dagger.io/dagger/releases/${DAGGER_VERSION}/dagger_v${DAGGER_VERSION}_linux_${ARCH}.tar.gz" \
-    && tar -xzf /tmp/dagger.tar.gz -C /usr/local/bin dagger \
-    && rm /tmp/dagger.tar.gz \
-    && dagger version
-
-# Install yq (for editing YAML files in workflows)
-RUN ARCH="${TARGETARCH:-$(dpkg --print-architecture)}" \
-    && curl -fsSL -o /usr/local/bin/yq \
-    "https://github.com/mikefarah/yq/releases/latest/download/yq_linux_${ARCH}" \
-    && chmod +x /usr/local/bin/yq \
-    && yq --version
-
-# Install flyctl (for Fly.io cache purge after docs deploy)
-RUN curl -L https://fly.io/install.sh | sh \
-    && mv /root/.fly/bin/flyctl /usr/local/bin/fly \
-    && rm -rf /root/.fly
-
-# Default to bash
-CMD ["/bin/bash"]