Fix duplicated author/steering-committee folders

[richarddushime]

Description

Fixes #792 issue
content/authors/ mixes blog-post author profiles and steering committee (SC)
member profiles, generated by scripts/generate_sc_profiles.py. The script was
minting a fresh, differently-slugged folder for the same person almost every
time it ran, instead of reusing an existing one — #573 tried to fixed this , but
it didn't stick because the generator itself was never fixed.

Root cause: normalize_name/sanitize_filename had double-escaped regexes
(r'\\s+' instead of r'\s+', etc.), so whitespace collapsing and
"Dr"-prefix stripping were silent no-ops, and hyphens in compound surnames
(e.g. "Matvienko-Sikar") were being stripped even though Hugo's urlize —
which the pre-existing author slugs already follow — preserves them. Any
minor difference in how a name was written across the SC roster sheet, the
personal-details form, or an existing author folder therefore produced a new
slug, and the script never checked for an existing folder before creating one.

Changes

• Fix the regex escaping bugs in normalize_name/sanitize_filename.
• Add find_existing_author_dir(), which fuzzy-matches a person against
  existing content/authors/ folder names before minting a fresh slug, so
  reruns converge on the one real folder.
• Clean up the repo: remove 30 orphaned duplicate folders (adampartridge,
  drflavioazevedo, karenmatvienkosikar, etc.), merge the one case with
  real duplicated content (Karen Matvienko-Sikar's role/team data and a
  better photo) into the canonical folder, and update
  content/about/steering-committee/index.md's hardcoded image/modal
  references to point at the canonical slugs.

Type of Change

• Content/documentation update
• Bug fix

Testing

• Tested locally
• Previewed on staging.forrt.org

Checklist

• Self-reviewed my changes
• Verified links and formatting are correct
• No new warnings or errors

Notes

[github-actions]

👍 All image files/references (if any) are in webp format, in line with our policy.

[github-actions]

✅ Spell Check Passed

No spelling issues found when checking 3 changed file(s)! 🎉

[LukasWallrich]

✅ Staging Deployment Status

This PR has been successfully deployed to staging as part of an aggregated deployment.

Deployed at: 2026-07-05 08:21:25 UTC
Staging URL: https://staging.forrt.org

The staging site shows the combined state of all compatible open PRs.