feat(examples): add Chroma + OpenViking minimal integration example

[yeyitech]

Summary

• add a minimal Chroma + OpenViking integration example with short-context and long-memory flows
• include sample docs, local requirements, and example ov.conf
• add a small smoke test for fixture/document loading

Testing

• python -m pytest -q examples/chroma-openviking/test_smoke.py

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🏅 Score: 85

🧪 PR contains tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ Recommended focus areas for review Silent Exception Swallowing The bare except Exception: block when deleting the Chroma collection swallows all errors without logging, hiding potential issues like permission errors or invalid client state. try: client.delete_collection(collection_name) except Exception: pass

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