Fix dependency injection example in Graphs docs

[derluke]

The provided example didn't run for me. With these changes the output is as expected

[hyperlint-ai]

PR Change Summary

Updated the graph example to ensure it runs correctly and produces the expected output.

• Added FullStatePersistence to the graph run method
• Updated the output history to reflect the new persistence structure

Modified Files

• docs/graph.md

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[DouweM]

@derluke Can you please have a look at the failing tests?

[derluke]

I don't know what happened. Retriggered the tests 👍