Mount docker CLI and compose plugin into gitea-runner

The act_runner container had the Docker socket but not the docker
binary, so deploy workflow steps using docker compose failed.

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

docker-compose.yml

@@ -190,6 +190,8 @@ services:
             - ./gitea-runner/config.yaml:/config.yaml
             - ./gitea-runner/data:/data
             - /var/run/docker.sock:/var/run/docker.sock # WARNING: Docker socket mount gives container host-level access. Runner is in 'disabled' profile to mitigate risk.
+            - /usr/bin/docker:/usr/bin/docker:ro
+            - /usr/lib/docker/cli-plugins:/usr/lib/docker/cli-plugins:ro
             - /home/adamf/deploy/web_server:/home/adamf/deploy/web_server # Same path on host and container so docker compose bind mounts resolve correctly
         restart: unless-stopped
         networks: