feat: prepare ARR for controlled public deployment

database/006_report_channel_manifest.down.sql

@@ -0,0 +1,29 @@
+-- Protected rollback for migration 006.
+-- Refuses to remove persisted report manifests.
+
+BEGIN;
+
+DO $$
+BEGIN
+    IF EXISTS (SELECT 1 FROM finance.report_channel_manifest) THEN
+        RAISE EXCEPTION
+            'refusing rollback: migration 006 data exists';
+    END IF;
+END;
+$$;
+
+DROP TRIGGER monthly_report_channel_manifest_guard
+    ON finance.report_versions;
+DROP FUNCTION finance.validate_monthly_report_channel_manifest();
+
+DROP TRIGGER published_report_channel_manifest_guard
+    ON finance.report_channel_manifest;
+DROP FUNCTION finance.protect_published_report_channel_manifest();
+
+DROP TRIGGER report_channel_manifest_parent_guard
+    ON finance.report_channel_manifest;
+DROP FUNCTION finance.validate_report_channel_manifest_parent();
+
+DROP TABLE finance.report_channel_manifest;
+
+COMMIT;