docs: fix warnings in documentation generation

docs/source/providers/vector_io/inline_chromadb.md

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 # inline::chromadb
 
 ## Description

docs/source/providers/vector_io/inline_faiss.md

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+orphan: true
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 # inline::faiss
 
 ## Description

docs/source/providers/vector_io/inline_meta-reference.md

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 # inline::meta-reference
 
 ## Description

docs/source/providers/vector_io/inline_milvus.md

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+orphan: true
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 # inline::milvus
 
 ## Description

docs/source/providers/vector_io/inline_qdrant.md

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+orphan: true
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 # inline::qdrant
 
 ## Description

docs/source/providers/vector_io/inline_sqlite-vec.md

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+orphan: true
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 # inline::sqlite-vec
 
 ## Description

docs/source/providers/vector_io/inline_sqlite_vec.md

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 # inline::sqlite_vec
 
 ## Description

docs/source/providers/vector_io/remote_chromadb.md

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+orphan: true
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 # remote::chromadb
 
 ## Description

docs/source/providers/vector_io/remote_milvus.md

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+orphan: true
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 # remote::milvus
 
 ## Description

docs/source/providers/vector_io/remote_pgvector.md

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+orphan: true
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 # remote::pgvector
 
 ## Description

docs/source/providers/vector_io/remote_qdrant.md

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+orphan: true
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 # remote::qdrant
 
 ## Description

docs/source/providers/vector_io/remote_weaviate.md

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+orphan: true
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 # remote::weaviate
 
 ## Description