Api docs updates (#20388)

* Update classification API docs

* Add information to events api

* Fix tag

* Add exports

* Add generic response to model for classification apis

* Add preview API information

* Cleanup

* Cleanup

frigate/api/defs/response/preview_response.py

@@ -0,0 +1,17 @@
+from typing import List
+
+from pydantic import BaseModel, Field
+
+
+class PreviewModel(BaseModel):
+    """Model representing a single preview clip."""
+
+    camera: str = Field(description="Camera name for this preview")
+    src: str = Field(description="Path to the preview video file")
+    type: str = Field(description="MIME type of the preview video (video/mp4)")
+    start: float = Field(description="Unix timestamp when the preview starts")
+    end: float = Field(description="Unix timestamp when the preview ends")
+
+
+PreviewsResponse = List[PreviewModel]
+PreviewFramesResponse = List[str]