feat: add student profile endpoints

Tiku.Api/Middleware/ExceptionHandlingMiddleware.cs

@@ -6,6 +6,7 @@ using Tiku.Application.Content;
 using Tiku.Application.Storage;
 using Tiku.Infrastructure.Content;
 using Tiku.Infrastructure.Learning;
+using Tiku.Infrastructure.Profile;
 using Tiku.Infrastructure.QuestionBanks;
 using Tiku.Infrastructure.Scoreline;
 
@@ -150,6 +151,16 @@ public sealed class ExceptionHandlingMiddleware(
                 return;
             }
 
+            if (exception is ProfileException profileException)
+            {
+                await WriteProblemAsync(
+                    context,
+                    profileException.Message,
+                    ProfileStatusCode(profileException.Code),
+                    profileException.Code);
+                return;
+            }
+
             if (exception is ObjectStorageException storageException)
             {
                 await WriteProblemAsync(
@@ -263,4 +274,15 @@ public sealed class ExceptionHandlingMiddleware(
             _ => StatusCodes.Status400BadRequest
         };
     }
+
+    private static int ProfileStatusCode(string code)
+    {
+        return code switch
+        {
+            "profile_access_denied" => StatusCodes.Status403Forbidden,
+            "profile_user_not_found" => StatusCodes.Status404NotFound,
+            "region_not_found" or "school_not_found" or "major_not_found" => StatusCodes.Status404NotFound,
+            _ => StatusCodes.Status400BadRequest
+        };
+    }
 }