Project Init

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

colaflow-api/src/ColaFlow.Domain/Exceptions/DomainException.cs

@@ -0,0 +1,18 @@
+namespace ColaFlow.Domain.Exceptions;
+
+/// <summary>
+/// Exception type for domain layer
+/// </summary>
+public class DomainException : Exception
+{
+    public DomainException()
+    { }
+
+    public DomainException(string message)
+        : base(message)
+    { }
+
+    public DomainException(string message, Exception innerException)
+        : base(message, innerException)
+    { }
+}