Add more filters for admin notification targeting

[knolleary]

Description

Allows notification hub messages to be targeted to users of certain team types and billing states.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 78.71%. Comparing base (16ec27d) to head (c4bd0c9).
Report is 77 commits behind head on main.

Files with missing lines	Patch %	Lines
forge/db/models/User.js	66.66%	2 Missing ⚠️
forge/routes/api/admin.js	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4843      +/-   ##
==========================================
+ Coverage   78.67%   78.71%   +0.03%     
==========================================
  Files         314      317       +3     
  Lines       15125    15178      +53     
  Branches     3483     3491       +8     
==========================================
+ Hits        11900    11947      +47     
- Misses       3225     3231       +6     

Flag	Coverage Δ
backend	78.71% <75.00%> (+0.03%)	⬆️

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[knolleary]

Fixes applied - all working locally.

[cstns]

Looking good to me!