袁聪的第一次提交，包含nl2sql,行情数据,场外申购

app/model/session.py

@@ -1,7 +1,6 @@
 from datetime import datetime
 
-from sqlalchemy import String, text
-from sqlalchemy.dialects.mysql import BIGINT, DATETIME, INTEGER, TINYINT
+from sqlalchemy import BigInteger, DateTime, Integer, String, text
 from sqlalchemy.orm import Mapped, mapped_column
 
 from app.model.base import Base
@@ -9,26 +8,26 @@ from app.model.base import Base
 
 class ConversationSession(Base):
     __tablename__ = "svc_conversation_session"
-    id: Mapped[int] = mapped_column(BIGINT(unsigned=True), primary_key=True, autoincrement=True)
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
     session_id: Mapped[str] = mapped_column(String(64), unique=True)
-    user_id: Mapped[int] = mapped_column(BIGINT(unsigned=True))
+    user_id: Mapped[int] = mapped_column(BigInteger)
     portal: Mapped[str] = mapped_column(String(32))
     agent_type: Mapped[str | None] = mapped_column(String(32))
     status: Mapped[str] = mapped_column(String(16), default="active")
-    clarification_round: Mapped[int] = mapped_column(TINYINT(unsigned=True), default=0)
-    message_count: Mapped[int] = mapped_column(INTEGER(unsigned=True), default=0)
+    clarification_round: Mapped[int] = mapped_column(Integer, default=0)
+    message_count: Mapped[int] = mapped_column(Integer, default=0)
     last_intent: Mapped[str | None] = mapped_column(String(32))
     config_version: Mapped[str | None] = mapped_column(String(64))
     started_at: Mapped[datetime] = mapped_column(
-        DATETIME(fsp=6), server_default=text("CURRENT_TIMESTAMP(6)")
+        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
     )
     last_active_at: Mapped[datetime] = mapped_column(
-        DATETIME(fsp=6), server_default=text("CURRENT_TIMESTAMP(6)")
+        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
     )
-    ended_at: Mapped[datetime | None] = mapped_column(DATETIME(fsp=6))
+    ended_at: Mapped[datetime | None] = mapped_column(DateTime)
     created_at: Mapped[datetime] = mapped_column(
-        DATETIME(fsp=6), server_default=text("CURRENT_TIMESTAMP(6)")
+        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
     )
     updated_at: Mapped[datetime] = mapped_column(
-        DATETIME(fsp=6), server_default=text("CURRENT_TIMESTAMP(6)")
+        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
     )