fix: null conversation id

api/migrations/versions/563cf8bf777b_enable_tool_file_without_conversation_id.py

+"""enable tool file without conversation id
+
+Revision ID: 563cf8bf777b
+Revises: b5429b71023c
+Create Date: 2024-03-14 04:54:56.679506
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '563cf8bf777b'
+down_revision = 'b5429b71023c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('tool_files', schema=None) as batch_op:
+        batch_op.alter_column('conversation_id',
+               existing_type=postgresql.UUID(),
+               nullable=True)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('tool_files', schema=None) as batch_op:
+        batch_op.alter_column('conversation_id',
+               existing_type=postgresql.UUID(),
+               nullable=False)
+
+    # ### end Alembic commands ###