📝 update docs for RAG search

[ianardee]

Description

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Requires a change to the official Guide documentation.

[Copilot]

🟡 Changes recommended

A moderate test assertion must be corrected to handle valid zero-match documents.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Updates RAG search documentation and integration-test coverage.

Changes:

• Expands RAG search parameter and filter documentation.
• Adds coverage for populated and empty search results.
• Clarifies model search integration test names.

File summaries

File	Summary	Review notes
tests/v2/search/test_rag_document_search_integration.py	Expands RAG search integration coverage.	Moderate (3 votes): total_matches may validly be zero; assert a non-negative count instead of truthiness.
tests/v2/search/test_model_search_integration.py	Clarifies model search integration test names.	No issues noted.
mindee/v2/search/rag_documents/rag_document_search_parameters.py	Improves parameter and filter documentation.	No issues noted.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 1
• Review effort level: Lite

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