Durable execution doc links are broken in READMEs

[astrobot-houston]

Originally reported by @ketpatil77 in #447.

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Describe the Bug

The "durable execution" documentation links in both the root README.md and packages/cli/README.md are broken. Clicking them leads to a missing or incorrect page instead of the existing concepts page that covers durable execution.

Expected Behavior

The durable execution links in both READMEs should point to the correct existing concepts page and resolve successfully when clicked.

Steps to Reproduce

1. Open the root README.md or packages/cli/README.md on GitHub.
2. Click the "durable execution" documentation link.
3. Observe that the link leads to a non-existent or incorrect page.

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Original implementation from #447 by @ketpatil77