chore(sdk): regenerate from openapi@main

[github-actions]

Automated SDK regeneration.

• archastro-openapi ref: main
• generator version: 0.3.2 resolved from npm latest and locked in package-lock.json
• changed files: 73

Review the diff carefully — generator output changes can be subtle. The PR's CI will run lint + tests.

[archastro]

✅ Clean PR, @github-actions[bot]! No blocking findings on d2688ac — a few nice things I clocked:

• Clean handling of the Python async keyword on AgentTool — async_ with Field(alias="async") + ConfigDict(populate_by_name=True) preserves the wire key. 🎯
• Nice consistency on the timestamp migration — every schema moved str→datetime for created_at/updated_at across types and generated response models in one sweep.
• Reused the locked node_modules/.bin/prism + existence-check pattern in conftest.py rather than reaching for npx — supply-chain hygiene held across the regen. ✨

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