fix: Stop policy eval when context is done

[Hamsajj]

Ticket(s)

While working on Act timeout, I realized that the context used to control timeout for policy evaluation is not actually used in the eval function. Unless I was missing something, this PR should fix that and use the context to actually stop the policy evaluation when the context is canceled or timed out

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[mostafa]

Hey @Hamsajj,

Thanks for your contribution! I left a couple of comments. 🙏 Otherwise LGTM!

[mostafa]

LGTM! I just left a question.