Feat/environment variables in workflow (#6515)

Co-authored-by: JzoNg <jzongcode@gmail.com>

api/migrations/versions/8e5588e6412e_add_environment_variable_to_workflow_.py

@@ -0,0 +1,33 @@
+"""add environment variable to workflow model
+
+Revision ID: 8e5588e6412e
+Revises: 6e957a32015b
+Create Date: 2024-07-22 03:27:16.042533
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+import models as models
+
+# revision identifiers, used by Alembic.
+revision = '8e5588e6412e'
+down_revision = '6e957a32015b'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('workflows', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('environment_variables', sa.Text(), server_default='{}', nullable=False))
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('workflows', schema=None) as batch_op:
+        batch_op.drop_column('environment_variables')
+
+    # ### end Alembic commands ###