Fix array fields dropping entries beyond the 9th on factsheet submit

[ajith1994]

Summary of the discussion

Issue #2328: adding more than 9 entries to an array field on a Model/Framework
factsheet (e.g. Author(s)) causes everything from the 10th entry onward to be
silently dropped on submit, and not restored when re-editing.

Root cause is in processPost() (modelview/helper.py): the regex
^{field}_\d$ matches only a single trailing digit, so field names like
authors_10, authors_11 never match and are discarded before saving.
parts.sort() also did a lexicographic (string) sort rather than numeric,
which would have scrambled entry order once the truncation was fixed.

Fix: changed \d$ to \d+$, and sort parts numerically by the trailing
index instead of lexicographically. Manually verified by submitting a Model
factsheet with 12 authors and confirming all 12 persist, in the correct
order, in modelview_basicfactsheet.authors.

Type of change (CHANGELOG.md)

Bugs

• Fix Model/Framework factsheets silently dropping the 10th and later
  entries of array fields (e.g. Author(s)) on submit, caused by a regex
  that only matched single-digit field-name suffixes.
  (#2365)

Workflow checklist

Automation

Closes #2328

PR-Assignee

• 🐙 Follow the workflow in
  CONTRIBUTING.md
• 📝 Update the
  CHANGELOG.md
• 📙 Update the documentation on
  mkdocs

[ajith1994]

Hi @jh-RLI,

Could you take a look when you get a chance? This fixes #2328 (Model/Framework
factsheets silently dropping array field entries beyond the 9th on submit).

This is my first contribution to the project. I will be happy to make any changes you'd like to see. And, please let me know if I have missed out anything.

Thank you!

[jh-RLI]

@ajith1994 Thanks a lot for the contribution. I’ll take a closer look at it next week; at first glance, it seems like you fixed it.