feat: schedule node add python version

migrations/versions/d4e5f6a7b8c9_squashed_baseline.py

@@ -179,6 +179,7 @@ def upgrade() -> None:
     sa.Column('node_key', sa.String(length=64), nullable=False, comment='画布内稳定标识'),
     sa.Column('node_name', sa.String(length=255), nullable=False),
     sa.Column('versions_id', mysql.CHAR(length=26), nullable=False),
+    sa.Column('python_version', mysql.String(length=8), nullable=False, server_default=sa.text("'3.12'"), comment='节点执行 Python 版本（3.8/3.10/3.12）'),
     sa.Column('timeout_seconds', mysql.INTEGER(), server_default=sa.text('600'), nullable=False),
     sa.Column('retry_count', mysql.INTEGER(), server_default=sa.text('0'), nullable=False),
     sa.Column('retry_interval_sec', mysql.INTEGER(), server_default=sa.text('5'), nullable=False),

migrations/versions/g7h8i9j0k1l2_add_schedule_node_python_version.py

@@ -0,0 +1,34 @@
+"""add schedule_nodes.python_version
+
+Revision ID: g7h8i9j0k1l2
+Revises: f6a7b8c9d0e1
+Create Date: 2026-08-11
+"""
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision: str = "g7h8i9j0k1l2"
+down_revision: str | Sequence[str] | None = "f6a7b8c9d0e1"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "schedule_nodes",
+        sa.Column(
+            "python_version",
+            sa.String(length=8),
+            nullable=False,
+            server_default=sa.text("'3.12'"),
+            comment="节点执行 Python 版本（3.8/3.10/3.12）",
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("schedule_nodes", "python_version")