feat: 新增产品生命周期阶段字段lifecycle_phase与售后工序词表

backend/alembic/versions/i1j2k3l4m5n6_add_product_lifecycle_phase.py

@@ -0,0 +1,45 @@
+"""add_product_lifecycle_phase
+
+Revision ID: i1j2k3l4m5n6
+Revises: h1h2h3h4h5h6
+Create Date: 2026-09-14
+
+产品生命周期阶段（lifecycle_phase）
+--------------------------------
+用于区分「生产阶段的测试（发货测试）」与「出库后再次返厂的售后维修」。
+
+存量数据一律回填 'PRODUCTION'（历史产品视为从未出库回流）；
+新数据由 SQLAlchemy 端 default 提供，双保险。
+"""
+from typing import Sequence, Union
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "i1j2k3l4m5n6"
+down_revision: Union[str, None] = "h1h2h3h4h5h6"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "products",
+        sa.Column(
+            "lifecycle_phase",
+            sa.String(20),
+            nullable=False,
+            server_default="PRODUCTION",
+            comment="生命周期阶段: PRODUCTION(生产制造) | AFTER_SALES(出库后返厂售后)",
+        ),
+    )
+    # 存量数据回填：历史产品从未出库回流，统一视为生产阶段
+    op.execute("UPDATE products SET lifecycle_phase = 'PRODUCTION' WHERE lifecycle_phase IS NULL")
+    # 加索引：售后设备排查（按阶段筛选）会高频用到
+    op.create_index(
+        "ix_products_lifecycle_phase", "products", ["lifecycle_phase"], unique=False,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_products_lifecycle_phase", table_name="products")
+    op.drop_column("products", "lifecycle_phase")