v0.4.0

Changelog

• d01269c chore: stamp v0.4.0 in changelog
• f85c5d6 feat: add HTTP/SSE transport support to generate command
• 4037082 feat: add MongoDB MCP server suite (4 assertions, clean scan)
• b398b7a feat: add Spring AI MCP server suite (Kotlin, HTTP transport)
• 3a39f7d feat: add file_not_contains, file_not_exists, and contains_any assertion types
• 35ce8c6 fix: SSE and HTTP transports missing Start() call
• 4f68f21 fix: scorecard transports tested 3->2 (no SSE assertions exist)
• 1ffbf77 fix: update tests for SSE Start() behavior, HTTP stays lazy