Blacksmith

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* Fix usage of proxy.

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* Release with httpx unfrozen.

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* Fix serialization of HttpUrl for pydantic >2.9

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* Release with httpx frozen to <0.28 due to Proxy update.

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* Authorize older prometheus client library.

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* Add :meth:`blacksmith.ResponseBox.inspect` method.
* Add :meth:`blacksmith.ResponseBox.inspect_err` method.
* Drop python 3.8 compatibility.
* Update the packaging (use uv and pdm instead of poetry).
* Update the CI.
* Change the licence to MIT License.