feat(api): add account workspaces and signed content events

server/src/WebDrop.Core/AccountProfile.cs

@@ -0,0 +1,11 @@
+using System.Text.Json.Serialization;
+
+namespace WebDrop.Core;
+
+public sealed class AccountProfile
+{
+    [JsonPropertyName("username")] public required string Username { get; init; }
+    [JsonPropertyName("displayName")] public required string DisplayName { get; init; }
+    [JsonPropertyName("avatar")] public string? Avatar { get; init; }
+    [JsonPropertyName("modifiedAt")] public required long ModifiedAt { get; init; }
+}