Support search configuration

**Feature request**
It would be great to have retry for models.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_retry` with default `false`.

Start by locating the configuration handling and the code path that invokes models. Check how existing options are defined and how model failures are reported before deciding where `enable_retry` applies. Done means the option defaults to false and, when enabled, model requests retry according to behavior confirmed by the project tests or maintainers.

Written by the indexing model from the issue text.