feat: add standalone AgentScope-Lab Harbor agent

[KumaKuma2002]

Summary

• Add AgentScope-Lab 0.2.0 as a standalone package under main_harness/candidates/agentscope-lab/.
• Provide the agentscope-lab Harbor-facing CLI plus a reference Harbor BaseAgent wrapper.
• Add versioned result, provenance, native-trace, and ATIF-v1.7 contracts together with validation schemas.
• Keep the 15 Harness-core Feature switches, workspace isolation, tracing, verification, error classification, and controlled ablation tooling inside the AgentScope-Lab boundary.

Why

This is a companion split from #18. It isolates the AgentScope implementation and Harbor handoff from the broader Harness-core attribution work so the agent boundary can be reviewed independently.

The portable runtime does not import Harbor. Harbor-specific registry and packaging changes remain integration-owned, while harbor_adapter/reference_harbor_agent.py documents and validates the expected wrapper contract.

Scope and impact

• 76 new text files, all under main_harness/candidates/agentscope-lab/.
• No modifications to the existing PawBench QwenPaw, OpenClaw, or Hermes runtime paths.
• No datasets, private results, run records, ablation outputs, caches, virtual environments, built wheels, symlinks, or machine-specific paths are included.
• API credentials remain environment-only and are redacted at external boundaries.

Validation

• 418 passed, 4 skipped in a clean standalone Python 3.12 environment.
  • The four skips are parity/data checks whose canonical Harness-core sources and local PawBench V2 task data intentionally remain in feat: add main harness core #18 or outside this PR.
• agentscope-lab --version reports 0.2.0; CLI help smoke test passed.
• Reproducible wheel double-build passed: 26 members, identical SHA-256 across both builds.
• Staged and remote boundary audits passed: 76 files, 0 out-of-scope paths, 0 binary diffs, 0 non-ignored symlinks.
• Secret/privacy scan found no private-key material, provider-formatted credentials, high-entropy hardcoded credential assignments, private result paths, or local user paths.

Harbor handoff

The handoff includes:

• harbor_adapter/reference_harbor_agent.py for the Harbor wrapper contract;
• stable JSON schemas for result, provenance, and ATIF output;
• explicit error codes and retryability semantics;
• a pinned, reproducible wheel build process;
• contract validators for generated Harbor artifacts.

Harbor integration should pin the AgentScope-Lab wheel and Harbor revision, register the wrapper class, and retain the documented no-resume boundary until resume support is implemented.

[helloml0326]

agentscope-lab-harbor-integration-proposal.md
这是融合到harbor的方案，可以作为参考