feat: add ANTHROPIC_API_KEY to GitHub Actions

[miams]

Summary

Adds ANTHROPIC_API_KEY environment variable to GitHub Actions test workflow to enable testing of LLM-powered commands.

Changes

• Updated to pass from repository secrets

Required Action

Before merging, add the ANTHROPIC_API_KEY secret to your repository:

1. Go to: https://github.com/miams/rmagent/settings/secrets/actions
2. Click New repository secret
3. Name: ANTHROPIC_API_KEY
4. Value: Your Anthropic API key (starts with sk-ant-)
5. Click Add secret

Benefits

• ✅ Enables testing of ask command with real LLM
• ✅ Enables testing of bio command without --no-ai flag
• ✅ Improves test coverage by running all commands properly
• ✅ Catches LLM-related issues earlier in CI

Testing

After adding the secret, the GitHub Actions workflow will:

• Run all tests including LLM-powered commands
• Provide better test coverage
• Validate LLM integration works correctly

The workflow will still pass if the secret is not set (commands that require LLM will fail gracefully and tests are designed to handle this).

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