Adds migration

src/dispatch/database/revisions/tenant/versions/2023-09-11_e151962478b3.py

@@ -0,0 +1,27 @@
+"""Adds initial canary support to signals
+
+Revision ID: e151962478b3
+Revises: 4e57f5b1f3f3
+Create Date: 2023-09-11 14:28:36.030592
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+# revision identifiers, used by Alembic.
+revision = "e151962478b3"
+down_revision = "4e57f5b1f3f3"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column("signal_instance", sa.Column("canary", sa.Boolean(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column("signal_instance", "canary")
+    # ### end Alembic commands ###