9.1.0

Added

• PredictionModelApi: model listing, inspection, creation, update and deletion, plus
  run inspection (get_run, list_runs, get_run_iterator) alongside the existing
  create_run.
• DashboardApi: new client for dashboard widget and table column discovery, exposed as
  client.dashboard_api.
• ExportApi: export_chart, export_dashboard_table and export_dashboard_table_bytes.
• New data classes PredictionModel, Dashboard, DashboardTable and TableColumn.
  PredictionModelRun gains the fields returned by the run resource.
• ExabelClient: new export_api_scheme argument to reach the Export API over plain HTTP
  for a local or proxied endpoint.

Changed

• Updated the protobuf stubs.
• protobuf 6.31.1 or later is now required, to match the updated stubs.

Fixed

• Model and run creation no longer retry, so an ambiguous server failure cannot leave
  duplicate resources behind.
• delete_model treats a missing model as already deleted, making deletion idempotent.
• A run response missing optional fields can be read back; the required
  configuration_source is validated when the request is serialized, and an explicit 0
  is preserved.
• Extra header names are normalized on both gRPC and HTTP, so headers that differ only in
  case are merged and repeated values are kept.