Add critical evaluation report of the website tutorials

[pedroliman]

What this adds

A critical evaluation of the website tutorials, written from the perspective of the target reader (a health economics and outcomes research modeler at the graduate level or beyond), under devdocs/tutorial-evaluation/.

Approach

• One evaluation per tutorial (eval-<name>.md), each judging the page on purpose and audience fit, pedagogy and concept introduction, writing against devdocs/guidance/writing_style.md, correctness (numbers re-run against the installed package), and where the page sits in the sequence.
• An overall report (README.md) that synthesizes the per-tutorial findings and adds the cross-cutting analysis that only surfaces when the pages are read as a set: where a concept is introduced relative to where it is first used, whether the pages link into a coherent path, and where they repeat or contradict each other.

Headline cross-cutting findings

• The "Next:" forward links contradict the sidebar reading order and leave the compartmental model and value-of-information pages with no forward link.
• Value of information (EVPI, EVPPI) is interpreted in six tutorials before the tutorial that defines it.
• The getting-started section opens with data plumbing rather than a model built on one of the engines.
• The replication gallery states that each replication extends to a probabilistic analysis, which holds for only two of its four pages.

Status

Work in progress. The overall report and several per-tutorial evaluations are in; the remaining per-tutorial files are being committed as the reviews finish, and the verdict table and a correction note are updated as they land.

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Generated by Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.39%. Comparing base (3024677) to head (048148c).
⚠️ Report is 21 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #80   +/-   ##
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  Coverage   95.39%   95.39%           
=======================================
  Files          40       40           
  Lines        1955     1955           
=======================================
  Hits         1865     1865           
  Misses         90       90           

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