NextcloudApp: polishing API, AppAPI 2.3.0

[bigcat88]

Maintenance update:

• applied changes from AppAPI 2.3.0 (renamed vars)
• fixed CI for Nextcloud Master with PGSQL(some server bug?)
• removed non needed stuff(optional API scopes)
• updated Security.md

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 99.81%. Comparing base (3fcf6b2) to head (430cbe8).

❗ Current head 430cbe8 differs from pull request most recent head d311d31. Consider uploading reports for the commit d311d31 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #233      +/-   ##
==========================================
- Coverage   99.84%   99.81%   -0.03%     
==========================================
  Files          42       42              
  Lines        5013     4986      -27     
==========================================
- Hits         5005     4977      -28     
- Misses          8        9       +1     

Files	Coverage Δ
nc_py_api/_session.py	100.00% <100.00%> (ø)
nc_py_api/_version.py	100.00% <100.00%> (ø)
nc_py_api/ex_app/__init__.py	100.00% <100.00%> (ø)
nc_py_api/ex_app/defs.py	100.00% <ø> (ø)
nc_py_api/ex_app/integration_fastapi.py	100.00% <100.00%> (ø)
nc_py_api/files/files.py	100.00% <ø> (ø)
nc_py_api/ex_app/misc.py	96.42% <50.00%> (-3.58%)	⬇️