Create TenantAccessMiddleware

[Dresdn]

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Checklist

• I have double checked that there are no unrelated changes in this pull request (old patches, accidental config files, etc.)
• I have created at least one test case for the changes I have made
• I have updated the documentation for the changes I have made
• I have added my changes to the CHANGELOG.md

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Related issue(s)

Refs #485 & #593

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.98%. Comparing base (2b2c385) to head (6739fec).
Report is 86 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #594      +/-   ##
==========================================
+ Coverage   88.36%   89.98%   +1.61%     
==========================================
  Files          18       22       +4     
  Lines         619      719     +100     
  Branches      116      125       +9     
==========================================
+ Hits          547      647     +100     
  Misses         62       62              
  Partials       10       10              

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