GenAI Refactor (#23253)

* Ensure runtime options are passed

* Add attribute info to prompt when configured

* Move GenAI plugins to dedicated directory

* Migrate prompts to dedicated folder

* Move chat prompts to prompts

* Implement reasoning traces in the UI

* Cleanup

* Make azure a subclass of openai

* Implement reasoning for other providers

* mypy

* Cleanup

frigate/genai/plugins/azure-openai.py

@@ -0,0 +1,53 @@
+"""Azure OpenAI Provider for Frigate AI.
+
+Azure OpenAI exposes the same chat completions API as OpenAI once the
+client is constructed, so this provider inherits all transport, streaming,
+reasoning, and tool-calling logic from :class:`OpenAIClient` and only
+overrides what is genuinely Azure-specific:
+
+- Client construction: parses ``api-version`` out of the configured
+  ``base_url`` query string and instantiates :class:`openai.AzureOpenAI`
+  with ``azure_endpoint`` instead of ``base_url``. Raises if the URL is
+  malformed; :class:`GenAIClientManager` catches the exception and
+  disables the provider.
+- Context size: Azure does not expose a per-model ``max_model_len`` field
+  reliably, so we keep the historical 128K default rather than the
+  model-name heuristic used by OpenAI.
+"""
+
+import logging
+from urllib.parse import parse_qs, urlparse
+
+from openai import AzureOpenAI
+
+from frigate.config import GenAIProviderEnum
+from frigate.genai import register_genai_provider
+from frigate.genai.plugins.openai import OpenAIClient
+
+logger = logging.getLogger(__name__)
+
+
+@register_genai_provider(GenAIProviderEnum.azure_openai)
+class AzureOpenAIClient(OpenAIClient):
+    """Generative AI client for Frigate using Azure OpenAI."""
+
+    def _init_provider(self) -> AzureOpenAI:
+        """Initialize the AzureOpenAI client from the configured base_url."""
+        parsed_url = urlparse(self.genai_config.base_url or "")
+        query_params = parse_qs(parsed_url.query)
+        api_version = query_params.get("api-version", [None])[0]
+
+        if not api_version:
+            raise ValueError("Azure OpenAI base_url is missing api-version.")
+
+        azure_endpoint = f"{parsed_url.scheme}://{parsed_url.netloc}/"
+
+        return AzureOpenAI(
+            api_key=self.genai_config.api_key,
+            api_version=api_version,
+            azure_endpoint=azure_endpoint,
+        )
+
+    def get_context_size(self) -> int:
+        """Azure does not reliably surface per-model context size; use 128K."""
+        return 128000