✨(backend) enhance document indexing with error handling and changelog

I enhance document indexing with error handling and changelog

CHANGELOG.md

@@ -20,19 +20,21 @@ and this project adheres to
 - ✨(backend) allow indexation of documents with either empty content or title.
 - ✨(api) new fulltext 'search/' view with OIDC resource server authentication
 - ✨(backend) limit access to documents : public & authenticated with a
+              linkreach & owned ones
+- ✨(backend) limit search to the calling app (audience) and a configured
               list of services
 - 🔧(compose) rename docker network 'lasuite-net' as 'lasuite-network'
 - ✨(backend) add demo service for Drive.
 - ✨(backend) add OPENSEARCH_INDEX_PREFIX setting to prevent naming overlaping
               issues if the opensearch database is shared between apps.
 - ✨(backend) add tags
-- ✨(backend) adapt to conversation RAG
 - ✨(backend) add deletion endpoint 
 
 ## Changed
 
 - 🏗️(backend) switch Python dependency management to uv
 - ✨(backend) allow deletion by tags
+- ✨(backend) adapt search response to conversation RAG
 
 ## Fixed