refactor(memory): consolidate write pipeline and rename statement extraction step

- Rename StatementExtractionStep → StatementTemporalExtractionStep and
  extract_statement.jinja2 → extract_statement_temporal.jinja2 to reflect
  merged temporal extraction logic
- Move extraction_pipeline_orchestrator.py out of steps/ to engine root
- Move dedup_step.py into steps/ directory
- Introduce WriteMemoryRequest schema to replace positional args in write_memory()
- Extract _resolve_and_load_config, _preprocess_files, _write_neo4j, and
  _invalidate_interest_cache as private helpers in MemoryAgentService
- Remove shadow pipeline and simplify NEW_PIPELINE_ENABLED branch
- Merge 类型归属/成员隶属/任职服务 relation types into single 归属身份关系 in triplet prompt
- Add alias merge logic (别名属于) in deduplication and MERGE_ALIAS_BELONGS_TO Cypher query
- Add StorageType, Language, MessageItem enums/models to memory_agent_schema
- Reduce AgentMemory_Long_Term.DEFAULT_SCOPE from 6 to 1
- Delete standalone extract_temporal.jinja2 (logic merged into statement step)

api/app/schemas/memory_agent_schema.py

@@ -1,9 +1,32 @@
 from abc import ABC
-from typing import Optional
+from enum import Enum
+from typing import Any, Optional
 
 from pydantic import BaseModel
 
 
+class StorageType(str, Enum):
+    """记忆存储后端类型"""
+    NEO4J = "neo4j"
+    RAG = "rag"
+
+
+class Language(str, Enum): # 没有传递到聚类的celery任务中去，任务会回退失败用默认值，考虑统一语言问题
+    """支持的语言"""
+    ZH = "zh"
+    EN = "en"
+
+
+class MessageItem(BaseModel):
+    """单条消息结构"""
+    role: str
+    content: str
+    files: Optional[list[dict]] = None
+    file_content: Optional[list[Any]] = None
+
+    model_config = {"extra": "allow"}
+
+
 class UserInput(BaseModel):
     message: str
     history: list[dict]
@@ -18,6 +41,16 @@ class Write_UserInput(BaseModel):
     config_id: Optional[str] = None
 
 
+class WriteMemoryRequest(BaseModel):
+    """write_memory() 的参数封装"""
+    end_user_id: str
+    messages: list[MessageItem]
+    config_id: Optional[Any] = None
+    storage_type: StorageType = StorageType.NEO4J
+    user_rag_memory_id: str = ""
+    language: Language = Language.ZH
+
+
 class AgentMemory_Long_Term(ABC):
     """长期记忆配置常量"""
     STORAGE_NEO4J = "neo4j"
@@ -25,7 +58,7 @@ class AgentMemory_Long_Term(ABC):
     STRATEGY_AGGREGATE = "aggregate"
     STRATEGY_CHUNK = "chunk"
     STRATEGY_TIME = "time"
-    DEFAULT_SCOPE = 6
+    DEFAULT_SCOPE = 1
     TIME_SCOPE = 5