docs: clarify validation checklist as ongoing checkpoints

EXHAUSTIVE_TODO_LIST.md

@@ -4296,19 +4296,21 @@ Critical path dependencies:
 
 ## VALIDATION CHECKLIST
 
+> **Note**: These are ongoing checkpoints that should be verified after each epic/action, not one-time tasks. They are marked as incomplete to indicate they require continuous verification.
+
 After each epic:
-- [ ] All tests pass
-- [ ] No TypeScript errors
-- [ ] No console errors
-- [ ] Visual regression tests pass (if applicable)
-- [ ] Performance metrics unchanged or improved
-- [ ] Documentation updated
+- [ ] All tests pass *(ongoing verification required)*
+- [ ] No TypeScript errors *(ongoing verification required)*
+- [ ] No console errors *(ongoing verification required)*
+- [ ] Visual regression tests pass (if applicable) *(ongoing verification required)*
+- [ ] Performance metrics unchanged or improved *(ongoing verification required)*
+- [ ] Documentation updated *(ongoing verification required)*
 
 After each atomic action:
-- [ ] Code compiles without errors
-- [ ] No new console warnings
-- [ ] Related functionality still works
-- [ ] Git commit created (for rollback safety)
+- [ ] Code compiles without errors *(ongoing verification required)*
+- [ ] No new console warnings *(ongoing verification required)*
+- [ ] Related functionality still works *(ongoing verification required)*
+- [ ] Git commit created (for rollback safety) *(ongoing verification required)*
 
 ## TESTING REQUIREMENTS