CVE-2026-73802: gitea-runner: workflow container.options passes host namespaces and capability flags to job container when privileged mode is disabled

act_runner appends workflow-controlled jobs.<job>.container.options directly to the Docker HostConfig for the job container. When runner privileged mode is disabled, only Privileged is forced false. Host namespace flags, capability expansion, and security profile overrides from workflow YAML are preserved in the final HostConfig. A workflow author can enter host PID/IPC namespaces and execute commands on the runner host as root.