🤦 Switch model from claude-opus-4-7 to claude-opus-4-6

[mrjf]

😅 What happened

Turns out claude-opus-4-7 isn't available through the Copilot engine yet. Every autoloop and evergreen run has been crashing with:

isModelNotSupportedError=true
400 The requested model is not supported.

We literally just merged the PR to switch to opus 4.7. Whoops 🙃

🔧 Fix

Change both workflows from claude-opus-4-7 → claude-opus-4-6 and recompile.

Files:

• .github/workflows/autoloop.md
• .github/workflows/evergreen.md