feat: Add pyseekdb support as storage backend (Issue #117)

[NTLx]

This PR introduces pyseekdb support as a first-class storage backend for PowerMem, addressing Issue #117 and contributing to the OceanBase AI Coding Event.

🚀 Key Features

• Native Integration: Uses the official pyseekdb client (the next-gen Python driver for OceanBase vector store) for optimal performance and compatibility.
• Seamless Config: Added PySeekDBConfig which integrates perfectly with PowerMem's existing configuration system (factory pattern).
• Robust Implementation: The PySeekDBVectorStore adapter implements the full VectorStoreBase interface, supporting:
  • CRUD operations (Insert, Delete, Update, Get)
  • Vector Similarity Search (KNN/ANN)
  • Collection Management
• Type Safety: Fully typed implementation passing static analysis checks.

🛠 Implementation Details

1. Dependencies: Added pyseekdb>=1.0.0 to pyproject.toml.
2. Configuration:
   • Created src/powermem/storage/config/pyseekdb.py.
   • Updated src/powermem/storage/configs.py to register the new provider config.
3. Core Logic:
   • Created src/powermem/storage/pyseekdb/pyseekdb_store.py containing the adapter logic.
   • Maps PowerMem's search and insert calls to pyseekdb's corresponding APIs.
4. Factory:
   • Updated src/powermem/storage/factory.py to recognize provider='pyseekdb'.

✅ AI Contribution Details

• Analysis: Analyzed the existing VectorStoreBase interface and oceanbase implementation to design a consistent adapter.
• Environment: Set up a dedicated virtual environment to verify pyseekdb API signatures and resolve dependencies.
• Implementation: Wrote the complete adapter and configuration code, ensuring all abstract methods were implemented.
• Verification: Performed static type checking (Pyright) to fix method signature mismatches and type errors.

Looking forward to your review! 🚢

[Teingi]

Got it. Reviewing now.

[Teingi]

The test pipeline failed： https://github.com/oceanbase/powermem/actions/runs/21540100007/job/62073302252?pr=208

[Teingi]

The test pipeline failed： https://github.com/oceanbase/powermem/actions/runs/21540100007/job/62073302252?pr=208

ok, pyseekdb Requires-Python <4.0,>=3.11

[Teingi]

LGTM