Fix permissions are not requested by pages()/reduce()

[tb1337]

pypaperless didn't request object permissions when using the IterableMixin, as it did when using the CallableMixin.

Solves #161.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.15%. Comparing base (4e0880d) to head (d903065).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #183   +/-   ##
=======================================
  Coverage   98.15%   98.15%           
=======================================
  Files          34       34           
  Lines        1460     1461    +1     
  Branches      190      191    +1     
=======================================
+ Hits         1433     1434    +1     
  Misses         13       13           
  Partials       14       14           

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud