add broadcast provider message table to DB

we need to track the state of sending to different provider separately
(and trigger them off separately, refer to references separately, etc)

migrations/versions/0332_broadcast_provider_msg.py

@@ -0,0 +1,49 @@
+"""
+
+Revision ID: 0332_broadcast_provider_msg
+Revises: 0331_add_broadcast_org
+Create Date: 2020-10-26 16:28:11.917468
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision = '0332_broadcast_provider_msg'
+down_revision = '0331_add_broadcast_org'
+
+STATUSES = [
+    'technical-failure',
+    'sending',
+    'returned-ack',
+    'returned-error',
+]
+
+
+def upgrade():
+
+    broadcast_provider_message_status_type = op.create_table(
+        'broadcast_provider_message_status_type',
+        sa.Column('name', sa.String(), nullable=False),
+        sa.PrimaryKeyConstraint('name')
+    )
+    op.bulk_insert(broadcast_provider_message_status_type, [{'name': status} for status in STATUSES])
+
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        'broadcast_provider_message',
+        sa.Column('id', postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column('broadcast_event_id', postgresql.UUID(as_uuid=True), nullable=True),
+        sa.Column('provider', sa.String(), nullable=True),
+        sa.Column('status', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=False),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.ForeignKeyConstraint(['broadcast_event_id'], ['broadcast_event.id'], ),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('broadcast_event_id', 'provider')
+    )
+
+
+def downgrade():
+    op.drop_table('broadcast_provider_message')
+    op.drop_table('broadcast_provider_message_status_type')