ai_provider_dxpr 1.3.0

Changes since 1.2.0:
- Add a "Default tone of voice" setting next to "Default model", shared by DXPR Builder and CKEditor AI Agent so one brand tone is the default in both editors
- Fix: preserve model metadata (such as original_model) in non-streamed chat responses
- Fix: match the default tone by term ID, so taxonomy terms that share a label no longer pick the wrong tone
- Fix: default tone hook not running on Drupal 10.3 to 11.0
- Fix: fatal TypeError on undecodable tool call arguments, now a typed exception
- Fix: API errors in non-streamed requests now surface as typed AI exceptions with the API message
- Fix: token usage missing from non-streamed responses
- Fix: account balance leaking into raw output, metadata and streamed chunks
- Preserve a URL scheme in the configured host