[Fix] Azure OpenAI returns 404 with resource endpoint (#1192)

* fix(provider): support Azure OpenAI resource endpoints

* test(provider): keep Azure constructor mock focused

* test(settings): snapshot Azure OpenAI guidance

* test(settings): focus Azure guidance snapshot

* test(settings): trim Azure guidance snapshot

* test(settings): add Azure guidance visual baseline

* test(settings): explain CT bundle setup

* fix(settings): translate Azure OpenAI guidance

* fix(providers): correct and deduplicate Azure OpenAI detection

* fix: align Azure AI Inference routing guidance

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Co-authored-by: Roomote <roomote@roomote.dev>
Co-authored-by: Elliott de Launay <edelauna@gmail.com>