feat(db): add Customer.add_time column + migration

Co-Authored-By: Claude <noreply@anthropic.com>

yunke-server/app/api/schemas.py

@@ -33,6 +33,7 @@ class CustomerOut(BaseModel):
     dept_name: str | None = None
     head_image_url: str | None = None
     last_chat_time: int | None = None
+    add_time: int | None = None
     message_count: int | None = None
     version: str | None = None
     # Verbatim upstream friend record (~60 camelCase fields). Surfaced so the

yunke-server/app/db/models.py

@@ -233,6 +233,7 @@ class Customer(Base):
     dept_name: Mapped[str | None] = mapped_column(String(255), nullable=True)
     head_image_url: Mapped[str | None] = mapped_column(String(1024), nullable=True)
     last_chat_time: Mapped[int | None] = mapped_column(BigInteger, nullable=True)
+    add_time: Mapped[int | None] = mapped_column(BigInteger, nullable=True)  # ms epoch; from raw_json.addTime
     send_num: Mapped[int | None] = mapped_column(Integer, nullable=True)
     receive_num: Mapped[int | None] = mapped_column(Integer, nullable=True)
     message_count: Mapped[int | None] = mapped_column(Integer, nullable=True)

yunke-server/migrations/versions/3892dbfab839_customer_add_time.py

@@ -0,0 +1,36 @@
+"""customer add_time
+
+Revision ID: 3892dbfab839
+Revises: 96975050fa79
+Create Date: 2026-08-05 18:37:00.679685
+
+"""
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision: str = '3892dbfab839'
+down_revision: str | Sequence[str] | None = '96975050fa79'
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('customer', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('add_time', sa.BigInteger(), nullable=True))
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('customer', schema=None) as batch_op:
+        batch_op.drop_column('add_time')
+
+    # ### end Alembic commands ###