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>
FrequencyPenalty, PresencePenalty, and ParallelToolCalls were
present on ChatCompletionRequest but never forwarded in
buildParams, so agent-level settings configured via functional
options were silently ignored for the OpenAI provider.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
buildResponseFormat was hardcoding strict: true instead of
reading rf.JSONSchema.Strict, making it impossible to request
non-strict JSON-schema output.
Signed-off-by: Bryan Frimin <bryan@getprobo.com>
