fix: sync monoforum suggested post flow

deploy/migrations/0134_suggested_post_effective_publish_date.down.sql

@@ -0,0 +1,17 @@
+-- The data backfill is intentionally retained on rollback.  Restore only the
+-- pre-0134 shape constraint, which allowed zero schedule_date in every state.
+ALTER TABLE suggested_post_approvals
+    DROP CONSTRAINT suggested_post_approvals_shape_check;
+
+ALTER TABLE suggested_post_approvals
+    ADD CONSTRAINT suggested_post_approvals_shape_check CHECK (
+        monoforum_id>0 AND suggestion_message_id>0 AND parent_channel_id>0 AND
+        actor_user_id>0 AND payer_user_id>0 AND created_at>0 AND updated_at>=created_at AND
+        state IN ('balance_low','rejected','scheduled','published','completed','refunded') AND
+        price_kind IN ('','stars','ton') AND price_amount>=0 AND price_nanos BETWEEN 0 AND 999999999 AND
+        ((price_kind='' AND price_amount=0 AND price_nanos=0) OR
+         (price_kind='stars' AND price_amount>0) OR
+         (price_kind='ton' AND price_amount>0 AND price_nanos=0)) AND
+        schedule_date>=0 AND approval_service_message_id>=0 AND published_message_id>=0 AND
+        settlement_due>=0 AND final_service_message_id>=0
+    );