GOATS-815 GOATS-822: Monkeypatch tom-tns to use user credentials.

[davner]

• Patch group fetching per user.
• Add tom-tns to GOATS.
• Update settings.tmpl.

Checklist

• Added a release note in doc/changes using the PR number.

[codecov]

Codecov Report

❌ Patch coverage is 51.16279% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.81%. Comparing base (2f8ada5) to head (e21d6c5).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/goats_tom/middleware/tns.py	45.83%	13 Missing ⚠️
src/goats_tom/apps.py	50.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #378      +/-   ##
==========================================
- Coverage   75.85%   75.81%   -0.04%     
==========================================
  Files         229      230       +1     
  Lines        7129     7171      +42     
  Branches      447      451       +4     
==========================================
+ Hits         5408     5437      +29     
- Misses       1638     1651      +13     
  Partials       83       83              

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