- Added a new vector search syncer to aggregate questions and answers with comments for vector embedding.
- Introduced a new VectorSearch interface and related structures for managing vector storage and similarity search.
- Refactored embedding service to delegate semantic search to the new vector search plugin.
- Removed embedding-related fields from SiteAIProvider and UI forms as part of the transition to the new vector search architecture.
- Updated plugin registration to include vector search capabilities.
- Cleaned up embedding service methods and removed unused dependencies.
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