feat: add STRUCT level mmap config [2.6] (#3037)

master: #3036
issue: milvus-io/milvus#42148

Signed-off-by: SpadeA <[email protected]>

Author: SpadeA-Tang

pymilvus/orm/schema.py

@@ -408,6 +408,10 @@ def add_field(self, field_name: str, datatype: DataType, **kwargs):
                 raise ParamError(message="Param max_capacity is required when datatype is STRUCT")
             struct_schema.max_capacity = kwargs["max_capacity"]
 
+            if "mmap_enabled" in kwargs:
+                for field in struct_schema.fields:
+                    field._type_params["mmap_enabled"] = kwargs["mmap_enabled"]
+
             self._struct_fields.append(struct_schema)
             return self