v2.2.0 - Support MCP 2.0

Changed

• Migrated to MCP Python SDK 2.0 MCPServer with typed tools
• Reuse one HTTP client and read WEBHOOK_SITE_API_KEY from the environment
• wait_for_request / wait_for_email wait for new events by default (return_existing=true for the old behavior)
• SSRF output split into callback_payloads and local_bypass_examples

Fixed

• Server failed to start on MCP SDK 2.0
• ToolResult.to_json() crashed when data was None
• Token UUID validation skipped on several tools

Added

• Offline unit tests and CI
• Official server.json for the MCP Registry
• Cursor MCP config and authorized-use notes