Expand mixed inline/multiline function calls so each argument
is on its own line, matching the one-argument-per-line rule.
Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>
StreamAccumulator never set its model field, so
Response().Model was always empty for streamed
completions. Add a Model field to stream events
and populate it in all three providers (OpenAI,
Anthropic, Bedrock).
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
