Updated info about HTTP exceptions

Author: tisnik

src/app/endpoints/prompts.py

@@ -291,9 +291,15 @@ async def update_prompt_handler(
     - body: Prompt update parameters.
 
     ### Raises:
-    - HTTPException: If configuration is not loaded, if the prompt is not
-      found, if unable to connect to Llama Stack, or if the prompts API returns
-      an error response.
+    - HTTPException: with status 400 when request format is not valid.
+    - HTTPException: with status 401 for unauthorized access.
+    - HTTPException: with status 403 if permission is denied.
+    - HTTPException: with status 404 if prompt is not found.
+    - HTTPException: with status 422 if request payload is corrupted.
+    - HTTPException: with status 500 and a detail object containing `response`
+      and `cause` when service configuration is wrong or incomplete.
+    - HTTPException: with status 503 and a detail object containing `response`
+      and `cause` when unable to connect to Llama Stack.
 
     ### Returns:
     - PromptResourceResponse: The updated prompt object returned by Llama Stack.
@@ -352,8 +358,13 @@ async def delete_prompt_handler(
     - auth: Authentication tuple from the auth dependency (used by middleware).
 
     ### Raises:
-    - HTTPException: If configuration is not loaded, if unable to connect to
-      Llama Stack, or if the prompts API returns an error response.
+    - HTTPException: with status 401 for unauthorized access.
+    - HTTPException: with status 403 if permission is denied.
+    - HTTPException: with status 422 if request payload is corrupted.
+    - HTTPException: with status 500 and a detail object containing `response`
+      and `cause` when service configuration is wrong or incomplete.
+    - HTTPException: with status 503 and a detail object containing `response`
+      and `cause` when unable to connect to Llama Stack.
 
     ### Returns:
     - PromptDeleteResponse: An object describing whether the prompt was