Feature/add document summary to ingestion

[!IMPORTANT] Adds document summary generation to ingestion process and refactors search settings to SearchSettings.

Behavior:

Introduces document summary generation during ingestion in ingestion_service.py and ingestion_workflow.py.

Adds augment_document_info() to generate summaries using LLM and store embeddings.

Updates ingestion status to include AUGMENTING.

Search Settings:

Renames VectorSearchSettings and DocumentSearchSettings to SearchSettings across multiple files.

Updates search methods to use SearchSettings in retrieval_service.py, retrieval_router.py, and vector_search_pipe.py.

Database:

Modifies PostgresDocumentHandler to include summary and summary_embedding fields.

Adds full-text and semantic search capabilities in document.py.

Configuration:

Updates configuration files to include document summary settings.

Adds default_summary.yaml for summary prompt configuration.

Misc:

Refactors search pipelines and pipes to accommodate new search settings.

Updates API models and responses to reflect changes in document search results.

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SciPhi-AI / R2R

Feature/add document summary to ingestion #1573