Enhance audit logging: add new audit types for password reset and prospect image actions, and update related services to log these events

Co-authored-by: Copilot <copilot@github.com>

FoodsharingSiegen.Server/Auth/AuthService.cs

@@ -251,6 +251,14 @@ namespace FoodsharingSiegen.Server.Auth
             user.ResetToken = resetToken;
             user.ResetTokenExpiry = DateTime.UtcNow.AddMinutes(30);
 
+            Context.Audits?.Add(new Audit
+            {
+                Created = DateTime.Now,
+                Type = AuditType.RequestPasswordReset,
+                UserID = user.Id,
+                Data1 = user.Mail
+            });
+
             await Context.SaveChangesAsync();
 
             var resetLink = $"{baseUri.TrimEnd('/')}/reset-password/{resetToken}";