d9a24f4fdc
Implements three-tier retrieval system to address scalability and precision limitations in production environments with large document collections. Features: - Tier 1: Knowledge Base Routing (auto/rule-based/llm-based) - Tier 2: Document Filtering (metadata-based) - Tier 3: Chunk Refinement (vector search with parent-child support) Changes: - Add HierarchicalRetrieval class with configurable retrieval pipeline - Add hierarchical_retrieval_config field to Dialog model - Add database migration for new configuration field - Add comprehensive unit tests (35 tests, all passing) Fixes #11610 |
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| common | ||
| retrieval | ||
| services | ||
| utils | ||