Extend tenant maintenance lock for imports

backend/db/migrations/0055_tenant_export_maintenance_lock.sql

@@ -0,0 +1,22 @@
+ALTER TABLE "tenant_export_jobs"
+    ADD COLUMN IF NOT EXISTS "operation" text DEFAULT 'export' NOT NULL,
+    ADD COLUMN IF NOT EXISTS "previous_tenant_locked" "locked_tenant";
+
+ALTER TABLE "tenants"
+    ADD COLUMN IF NOT EXISTS "locked_by_export_job_id" uuid;
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1
+        FROM information_schema.table_constraints
+        WHERE constraint_schema = 'public'
+          AND constraint_name = 'tenants_locked_by_export_job_id_tenant_export_jobs_id_fk'
+    ) THEN
+        ALTER TABLE "tenants"
+            ADD CONSTRAINT "tenants_locked_by_export_job_id_tenant_export_jobs_id_fk"
+            FOREIGN KEY ("locked_by_export_job_id")
+            REFERENCES "tenant_export_jobs"("id")
+            ON DELETE SET NULL;
+    END IF;
+END $$;

backend/db/migrations/meta/_journal.json

@@ -365,6 +365,13 @@
       "when": 1783247083934,
       "tag": "0054_tenant_export_jobs",
       "breakpoints": true
+    },
+    {
+      "idx": 52,
+      "version": "7",
+      "when": 1784021669805,
+      "tag": "0055_tenant_export_maintenance_lock",
+      "breakpoints": true
     }
   ]
 }