docs: fix broken links and update node design documentation - #3239

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.0%. Comparing base (2845953) to head (ddbda91).
⚠️ Report is 11 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (2845953) and HEAD (ddbda91). Click for more details.

HEAD has 22 uploads less than BASE

Flag	BASE (2845953)	HEAD (ddbda91)
unit	2	1
proof	11	0
e2e	10	0

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