Integrate gotap for execution and verification

[mmaelicke]

Summary

Once tool-runner-js is aligned with the current spec (see the preceding issue), it should detect and use gotap when available in container images – same pattern as gorun and tool-runner.

Prerequisite: This work must be done after the spec alignment issue is completed. gotap integration assumes inputs.json with parameters + data structure.

Plan

1. Probe for gotap before run (e.g. gotap --version or which gotap in short-lived container)
2. If gotap present: Override container command to gotap run <tool_name> --input-file /in/inputs.json
3. If gotap absent: Use image default CMD (current behaviour)

Reference

• gorun: Integrate gotap for execution and verification gorun#3
• tool-runner (Python): Integrate gotap for execution and verification tool-runner#33
• gotap: https://github.com/tool-spec/gotap

[mmaelicke]

Depends on #13 (spec alignment).