feat(phase-31): add campaign scheduling and recurring automation (T-233 to T-234)

backend/alembic/versions/b017_add_campaign_scheduling.py

@@ -0,0 +1,58 @@
+"""add_campaign_scheduling
+
+Revision ID: b017scheduling
+Revises: b016retests
+Create Date: 2026-02-10 02:00:00.000000
+
+"""
+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 = "b017scheduling"
+down_revision: Union[str, None] = "b016retests"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "campaigns",
+        sa.Column("is_recurring", sa.Boolean, server_default="false", nullable=False),
+    )
+    op.add_column(
+        "campaigns",
+        sa.Column("recurrence_pattern", sa.String, nullable=True),
+    )
+    op.add_column(
+        "campaigns",
+        sa.Column("next_run_at", sa.DateTime, nullable=True),
+    )
+    op.add_column(
+        "campaigns",
+        sa.Column("last_run_at", sa.DateTime, nullable=True),
+    )
+    op.add_column(
+        "campaigns",
+        sa.Column(
+            "parent_campaign_id",
+            postgresql.UUID(as_uuid=True),
+            sa.ForeignKey("campaigns.id", ondelete="SET NULL"),
+            nullable=True,
+        ),
+    )
+    op.create_index("ix_campaigns_next_run", "campaigns", ["next_run_at"])
+    op.create_index("ix_campaigns_parent", "campaigns", ["parent_campaign_id"])
+
+
+def downgrade() -> None:
+    op.drop_index("ix_campaigns_parent", table_name="campaigns")
+    op.drop_index("ix_campaigns_next_run", table_name="campaigns")
+    op.drop_column("campaigns", "parent_campaign_id")
+    op.drop_column("campaigns", "last_run_at")
+    op.drop_column("campaigns", "next_run_at")
+    op.drop_column("campaigns", "recurrence_pattern")
+    op.drop_column("campaigns", "is_recurring")