Feat：memory sdk (#12538)

### What problem does this PR solve?

Move memory and message apis to /api, and add sdk support.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

sdk/python/ragflow_sdk/ragflow.py

@@ -21,6 +21,7 @@ from .modules.agent import Agent
 from .modules.chat import Chat
 from .modules.chunk import Chunk
 from .modules.dataset import DataSet
+from .modules.memory import Memory
 
 
 class RAGFlow:
@@ -289,3 +290,84 @@ class RAGFlow:
 
         if res.get("code") != 0:
             raise Exception(res["message"])
+
+    def create_memory(self, name: str, memory_type: list[str], embd_id: str, llm_id: str):
+        payload = {"name": name, "memory_type": memory_type, "embd_id": embd_id, "llm_id": llm_id}
+        res = self.post("/memories", payload)
+        res = res.json()
+        if res.get("code") != 0:
+            raise Exception(res["message"])
+        return Memory(self, res["data"])
+
+    def list_memory(self, page: int = 1, page_size: int = 50, tenant_id: str | list[str] = None, memory_type: str | list[str] = None, storage_type: str = None, keywords: str = None) -> dict:
+        res = self.get(
+            "/memories",
+            {
+                "page": page,
+                "page_size": page_size,
+                "tenant_id": tenant_id,
+                "memory_type": memory_type,
+                "storage_type": storage_type,
+                "keywords": keywords,
+            }
+        )
+        res = res.json()
+        if res.get("code") != 0:
+            raise Exception(res["message"])
+        result_list = []
+        for data in res["data"]["memory_list"]:
+            result_list.append(Memory(self, data))
+        return {
+            "memory_list": result_list,
+            "total_count": res["data"]["total_count"]
+        }
+
+    def delete_memory(self, memory_id: str):
+        res = self.delete(f"/memories/{memory_id}", {})
+        res = res.json()
+        if res.get("code") != 0:
+            raise Exception(res["message"])
+
+    def add_message(self, memory_id: list[str], agent_id: str, session_id: str, user_input: str, agent_response: str, user_id: str = "") -> str:
+        payload = {
+            "memory_id": memory_id,
+            "agent_id": agent_id,
+            "session_id": session_id,
+            "user_input": user_input,
+            "agent_response": agent_response,
+            "user_id": user_id
+        }
+        res = self.post("/messages", payload)
+        res = res.json()
+        if res.get("code") != 0:
+            raise Exception(res["message"])
+        return res["message"]
+
+    def search_message(self, query: str, memory_id: list[str], agent_id: str=None, session_id: str=None, similarity_threshold: float=0.2, keywords_similarity_weight: float=0.7, top_n: int=10) -> list[dict]:
+        params = {
+            "query": query,
+            "memory_id": memory_id,
+            "agent_id": agent_id,
+            "session_id": session_id,
+            "similarity_threshold": similarity_threshold,
+            "keywords_similarity_weight": keywords_similarity_weight,
+            "top_n": top_n
+        }
+        res = self.get("/messages/search", params)
+        res = res.json()
+        if res.get("code") != 0:
+            raise Exception(res["message"])
+        return res["data"]
+
+    def get_recent_messages(self, memory_id: list[str], agent_id: str=None, session_id: str=None, limit: int=10) -> list[dict]:
+        params = {
+            "memory_id": memory_id,
+            "agent_id": agent_id,
+            "session_id": session_id,
+            "limit": limit
+        }
+        res = self.get("/messages", params)
+        res = res.json()
+        if res.get("code") != 0:
+            raise Exception(res["message"])
+        return res["data"]