fix: admin service idp filter and wrong param names

[voneiden]

Ref HP-2169

This was a bit funky because the IDP is stored in an ArrayField.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.33333% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 95.48%. Comparing base (dc3ecb4) to head (7400e4f).
Report is 1 commits behind head on main.

Files	Patch %	Lines
services/admin.py	53.33%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #474      +/-   ##
==========================================
- Coverage   95.56%   95.48%   -0.08%     
==========================================
  Files         207      207              
  Lines        8222     8235      +13     
  Branches      991      994       +3     
==========================================
+ Hits         7857     7863       +6     
- Misses        279      286       +7     
  Partials       86       86              

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