[add] migration script

api/migrations/versions/70e94dd4a8d1_202512191820.py

@@ -0,0 +1,40 @@
+"""202512191820
+
+Revision ID: 70e94dd4a8d1
+Revises: f96a53af914c
+Create Date: 2025-12-19 18:20:21.998247
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision: str = '70e94dd4a8d1'
+down_revision: Union[str, None] = 'f96a53af914c'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_prompt_model_config_id'), table_name='prompt_model_config')
+    op.drop_table('prompt_model_config')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('prompt_model_config',
+    sa.Column('id', sa.UUID(), autoincrement=False, nullable=False),
+    sa.Column('tenant_id', sa.UUID(), autoincrement=False, nullable=False, comment='Tenant ID'),
+    sa.Column('system_prompt', sa.TEXT(), autoincrement=False, nullable=False, comment='System Prompt'),
+    sa.Column('created_at', postgresql.TIMESTAMP(), autoincrement=False, nullable=True, comment='Creation Time'),
+    sa.Column('updated_at', postgresql.TIMESTAMP(), autoincrement=False, nullable=True, comment='Update Time'),
+    sa.ForeignKeyConstraint(['tenant_id'], ['tenants.id'], name=op.f('prompt_model_config_tenant_id_fkey')),
+    sa.PrimaryKeyConstraint('id', name=op.f('prompt_model_config_pkey'))
+    )
+    op.create_index(op.f('ix_prompt_model_config_id'), 'prompt_model_config', ['id'], unique=False)
+    # ### end Alembic commands ###