Fix OpenSearch index creation in CI

- Remove cluster.blocks.create_index setting before creating indices to fix 403 errors in CI
- Fix AttributeError by serializing e.info dict to JSON string before writing to stdout

Author: photoroman

backend/dataroom/management/commands/setup_opensearch.py

@@ -1,3 +1,5 @@
+import json
+
 from django.core.management.base import BaseCommand
 from opensearchpy import TransportError
 
@@ -16,6 +18,18 @@ def handle(self, *args, **options):
         confirm = options['confirm']
         index_name = options['index'] or OSImage.INDEX
 
+        # Ensure cluster is writable (remove read-only block if present)
+        try:
+            OS.client.cluster.put_settings(
+                body={
+                    "persistent": {
+                        "cluster.blocks.create_index": None
+                    }
+                }
+            )
+        except TransportError as e:
+            self.stdout.write(self.style.WARNING(f'Could not remove cluster block: {json.dumps(e.info)}'))
+
         exists = OS.client.indices.exists(index=index_name)
         if exists:
             self.stdout.write(f'Index "{index_name}" already exists. Mappings will be updated.')
@@ -33,7 +47,7 @@ def handle(self, *args, **options):
                     body=OSImage.INDEX_SETTINGS['mappings'],
                 )
             except TransportError as e:
-                self.stdout.write(self.style.ERROR(e.info))
+                self.stdout.write(self.style.ERROR(json.dumps(e.info)))
                 raise e
         else:
             try:
@@ -42,7 +56,7 @@ def handle(self, *args, **options):
                     body=OSImage.INDEX_SETTINGS,
                 )
             except TransportError as e:
-                self.stdout.write(self.style.ERROR(e.info))
+                self.stdout.write(self.style.ERROR(json.dumps(e.info)))
                 raise e
 
         self.stdout.write(self.style.SUCCESS('Done!'))