v2.52.0

Feature

• Enrichment steps on all convert pipelines (incl docx, html, etc) (#2251) (2c91234)

Fix

• Add missing features in ThreadedStandardPdfPipeline (#2252) (0700af2)
• Address deprecation warnings of dependencies (#2237) (c696549)

Documentation

• Add an example of RAG with OpenSearch (#2238) (f8cc545)
• Add instructions for using Docling with MCP to README (#2219) (e5cd702)
• Document VLM support requirement in extraction example (#2231) (55f5f37)