feat(rag): Native RAG & Hybrid Vector Search Engine with Lucene & OpenSearch Parity - #2931

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ruisantana:feature/native-rag-hybrid-search-engine

Commits on Jul 24, 2026

feat(rag): add RAGService engine, LLM/Embedding providers, and SQLite cache
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feat(rag): add Swing RAGAssistantPanel UI tab for IPED-SearchApp
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feat(rag): integrate Lucene HNSW & OpenSearch KNN indexing pipelines
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config(rag): add RAGConfig.txt and set enableRAG=false opt-in safety
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feat(rag): add HAS_EMBEDDING property and ElasticSearch auth helpers
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feat(rag): add RAGAssistantPanel, SemanticSimilarity UI and supporting engine configs
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feat(rag): add RAG UI localization strings (EN/PT_BR) and IndexTask config
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fix(rag): add missing RAGAssistant.YouLabel and AssistantLabel localization keys
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fix(rag): graceful fallback when embedding endpoint or OpenSearch cluster is unreachable
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feat(rag): count embedded vectors and docs in ElasticSearchIndexTask statistics
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