Feat: add neo4j db for user_name (#365)

* feat: add server api prd

* feat: update memcube for api

* feat: add run server api  md and change user_id to user_id

* fix: code format

* fix:code

* fix: fix code format

* feat: remove ids

* fix: working ids

* feat: add_memreader config and change neo4j  db user_name

Author: fridayL

src/memos/api/config.py

@@ -76,6 +76,24 @@ def get_activation_config() -> dict[str, Any]:
             },
         }
 
+    @staticmethod
+    def get_memreader_config() -> dict[str, Any]:
+        """Get MemReader configuration."""
+        return {
+            "backend": "openai",
+            "config": {
+                "model_name_or_path": os.getenv("MEMRADER_MODEL", "gpt-4o-mini"),
+                "temperature": 0.6,
+                "max_tokens": int(os.getenv("MEMRADER_MAX_TOKENS", "5000")),
+                "top_p": 0.95,
+                "top_k": 20,
+                "api_key": os.getenv("MEMRADER_API_KEY", "EMPTY"),
+                "api_base": os.getenv("MEMRADER_API_BASE"),
+                "remove_think_prefix": True,
+                "extra_body": {"chat_template_kwargs": {"enable_thinking": False}},
+            },
+        }
+
     @staticmethod
     def get_activation_vllm_config() -> dict[str, Any]:
         """Get Ollama configuration."""
@@ -351,10 +369,7 @@ def get_product_default_config() -> dict[str, Any]:
             "mem_reader": {
                 "backend": "simple_struct",
                 "config": {
-                    "llm": {
-                        "backend": "openai",
-                        "config": openai_config,
-                    },
+                    "llm": APIConfig.get_memreader_config(),
                     "embedder": APIConfig.get_embedder_config(),
                     "chunker": {
                         "backend": "sentence",
@@ -447,10 +462,7 @@ def create_user_config(user_name: str, user_id: str) -> tuple[MOSConfig, General
             "mem_reader": {
                 "backend": "simple_struct",
                 "config": {
-                    "llm": {
-                        "backend": "openai",
-                        "config": openai_config,
-                    },
+                    "llm": APIConfig.get_memreader_config(),
                     "embedder": APIConfig.get_embedder_config(),
                     "chunker": {
                         "backend": "sentence",

src/memos/graph_dbs/nebular.py

@@ -432,7 +432,7 @@ def remove_oldest_memory(
 
         optional_condition = f"AND n.user_name = '{user_name}'"
         query = f"""
-            MATCH (n@Memory)
+            MATCH (n@Memory /*+ INDEX(idx_memory_user_name) */)
             WHERE n.memory_type = '{memory_type}'
             {optional_condition}
             ORDER BY n.updated_at DESC
@@ -1158,7 +1158,7 @@ def get_grouped_counts(
             group_by_fields.append(alias)
         # Full GQL query construction
         gql = f"""
-            MATCH (n)
+            MATCH (n /*+ INDEX(idx_memory_user_name) */)
             {where_clause}
             RETURN {", ".join(return_fields)}, COUNT(n) AS count
             GROUP BY {", ".join(group_by_fields)}