feat: Structured Output support (#231)

* Structured Output support

Added structured output support for chat. Tested all model providers + streaming.

We now also include the usage as part of the TextGenerationOutput. This was nice because it led to finding a bug in usage reporting for gemini in streaming.

Unit tests included as well

* Update pyproject.toml and uv.lock to both match newest version

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Signed-off-by: Kyle Qian <kylexqian@gmail.com>

Author: kylexqian

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "opengradient"
-version = "0.9.6"
+version = "0.9.7"
 description = "Python SDK for OpenGradient decentralized model management & inference services"
 authors = [{name = "OpenGradient", email = "adam@vannalabs.ai"}]
 readme = "README.md"