Populate paper feed entries

[koutst]

• On hub add or remove update feed entry table

Note: Not sure if removing elements is really necessary

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

Attention: Patch coverage is 92.85714% with 3 lines in your changes missing coverage. Please review.

Project coverage is 66.98%. Comparing base (b7366e4) to head (446f67d).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
src/paper/signals.py	90.90%	2 Missing ⚠️
src/feed/models.py	95.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2089      +/-   ##
==========================================
+ Coverage   66.50%   66.98%   +0.47%     
==========================================
  Files         428      428              
  Lines       23961    24000      +39     
==========================================
+ Hits        15936    16077     +141     
+ Misses       8025     7923     -102     

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