refactor(device): preparations for merge_device_status

[noaccOS]

Preparation commits for #1057.

• add a function to device queries to return the device to then build the status. This is needed to be able to build the device_status struct in a second moment.
• Have DeviceStatus.from_db_row trim the timestamps to millisecond precision, like the version in the Queries module. This also restores a test from before the refactors done lately.

• I have read CONTRIBUTING.md and CODE_OF_CONDUCT.md
• I have added to CHANGELOG.md relevant changes and any other user facing change
• I have added or ran the appropriate tests

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

• Yes
• No

Additional documentation e.g. usage docs, diagrams, etc.:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.76%. Comparing base (57d2b5b) to head (032dd31).
Report is 5 commits behind head on release-1.2.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.2    #1128      +/-   ##
===============================================
- Coverage        68.76%   68.76%   -0.01%     
===============================================
  Files              327      327              
  Lines             7504     7513       +9     
===============================================
+ Hits              5160     5166       +6     
- Misses            2344     2347       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.