add rag_config

config.json

@@ -17,6 +17,13 @@
   "num_attention_heads": 16,
   "num_hidden_layers": 28,
   "num_key_value_heads": 8,
+  "rag_config": {
+    "embedding_model_name":    "sentence-transformers/all-mpnet-base-v2",
+    "retrieval_top_k":         3,
+    "index_type":              "faiss",
+    "similarity_function":     "cosine",
+    "max_input_length":        512
+  },
   "rms_norm_eps": 1e-06,
   "rope_scaling": null,
   "rope_theta": 1000000,