Bump version to 0.4.0

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: mark-aronson

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "mcp-data-check"
-version = "0.3.0"
+version = "0.4.0"
 description = "Evaluate MCP server accuracy against known questions and answers"
 readme = "README.md"
 requires-python = ">=3.10"