5s mcp timout - no StdioConnectionParams sample code

### What happened?

https://github.com/google/adk-python/issues/1086

no StdioConnectionParams anywhere in this code. this caused Cline to fail to fix this bug when given the a2a-samples as context

idk why not just add timeout= to StdioServerParameters . thats what gemini 2.5 pro tried to do anyway.

### Relevant log output

```shell

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