Add existing errors as UserError as they will now be triggered inside of the task

crates/meilisearch-types/src/error.rs

@@ -529,6 +529,8 @@ impl ErrorCode for milli::Error {
                     | UserError::DocumentEditionCompilationError(_) => {
                         Code::EditDocumentsByFunctionError
                     }
+                    UserError::NetworkShardingWithoutSelf => Code::InvalidNetworkSharding,
+                    UserError::NetworkMissingUrl(_) => Code::MissingNetworkUrl,
                     UserError::CelluliteError(err) => match err {
                         cellulite::Error::BuildCanceled
                         | cellulite::Error::VersionMismatchOnBuild(_)

crates/milli/src/error.rs

@@ -432,6 +432,10 @@ and can not be more than 511 bytes.", .document_id.to_string()
     InvalidChatSettingsDocumentTemplateMaxBytes,
     #[error("{0}")]
     DocumentEmbeddingError(String),
+    #[error("enabling the sharding requires `.self` to be set\n  - Hint: Disable `sharding` or set `self` to a value.")]
+    NetworkShardingWithoutSelf,
+    #[error("Field `.remotes.{0}.url` cannot be set to `null`")]
+    NetworkMissingUrl(String),
 }
 
 impl From<crate::vector::Error> for Error {