fix: switch MCP server to stdio transport for llmx compatibility

- Add wrapper script run-crawl4ai-mcp.sh for stdio transport
- Update config.toml to use stdio instead of SSE
- llmx uses Streamable HTTP transport which is incompatible with SSE
- DB and REST still run via docker compose, MCP runs on-demand

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

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

.gitignore

@@ -5,6 +5,7 @@
 !.gitignore
 !config.toml
 !compose.yaml
+!*.sh
 
 # Allow servers directory and its contents
 !servers/