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3bf8d6e0a6
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feat: add pluggable embedding backend (Ollama + TF-IDF)
Implements embedding_backend from FEATURES.yaml:
- Abstract EmbeddingBackend interface
- OllamaEmbeddingBackend for local sovereign models
- TfidfEmbeddingBackend pure-Python fallback
- get_embedding_backend() auto-detection
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2026-04-12 05:04:53 +00:00 |
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