feat(reporting): Add remediation roadmap heuristics and checklist UI (PR 3/3)

[Rafiaminhaj]

This PR is PR 3 of 3 for the reporting rewrite. It introduces the priority and difficulty heuristics for the remediation roadmap, along with the interactive checklist UI in the HTML report and unit tests.

Closes #916

[utksh1]

Thanks for splitting this out from the broad reporting rewrite. I’m keeping this blocked for now because the roadmap/checklist change is still a subjective generated-report UI feature: it adds interactive checkboxes to a static report artifact, includes a new AI summary card/emoji change unrelated to roadmap heuristics, and relies on keyword-based difficulty labels that need clearer product semantics before becoming report output. Please narrow this to either the roadmap data heuristic with tests or a static, print/PDF-friendly remediation section without interactive checklist controls.

[Rafiaminhaj]

Hi @utksh1, thank you for the feedback!

I have updated this PR to make the remediation roadmap section completely static (removed the interactive checklist controls) and print/PDF-friendly. I have also restored the original styling for the AI executive summary card.

Please take another look when you have some time. Thank you!

[utksh1]

Still blocked after the latest update. The PR is now conflicting and still contains the previously requested broad reporting roadmap/checklist UI work. Please rebase after the merged reporting changes and narrow this to one defensible reporting behavior with static, print-friendly output and clear heuristic semantics.

[Rafiaminhaj]

Hi @utksh1,

I have successfully rebased the branch on top of the latest main (which contains the merged PR 1/3 and PR 2/3).

This PR is now updated, clean, and resolved of all conflicts. It contains only the roadmap data heuristics backend logic, the static print-friendly layout output, and the corresponding unit tests.

Please take a look at this updated version when you have a moment. Thank you!