feat(openclaw): add missing provider runtime hooks and non-interactive auth

[SPIKESPIGEL404]

Summary

Based on the updated OpenClaw plugin documentation, the BitRouter plugin is missing several provider runtime hooks and auth capabilities that would significantly improve UX.

Improvements

1. Add augmentModelCatalog + suppressBuiltInModel hooks (High Priority)

• augmentModelCatalog — Append synthetic model rows so openclaw models list shows BitRouter-routed models with proper metadata
• suppressBuiltInModel — Hide upstream built-in models that BitRouter is intercepting to avoid duplicates in model listings

2. Add buildMissingAuthMessage + buildAuthDoctorHint hooks (High Priority)

• buildMissingAuthMessage — Replace generic "missing auth" errors with BitRouter-specific guidance (e.g., "Run openclaw bitrouter setup to configure your provider")
• buildAuthDoctorHint — Integrate with openclaw plugins doctor to provide actionable repair hints when auth is misconfigured

3. Add runNonInteractive auth path (High Priority)

• Support headless/CI environments where users set env vars and expect BitRouter to activate without interactive prompts
• Detect BITROUTER_API_KEY, OPENAI_API_KEY, ANTHROPIC_API_KEY, etc. and auto-configure

Context

The OpenClaw plugin docs define 22 provider runtime hooks. The BitRouter plugin currently only implements ~2 (before_model_resolve for routing, basic formatApiKey for auth). Adding these hooks will:

• Make BitRouter models visible in openclaw models list
• Eliminate duplicate model entries
• Provide clear, actionable error messages
• Support CI/CD and headless deployments

References

• Plugin docs: https://docs.openclaw.ai/tools/plugin
• Current plugin version: 0.3.0 (BitRouter v0.10)

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