Move database operations to a background thread

[seer-by-sentry]

Fixes ANDROID-E. The issue was that: Blocking database queries and a large file write on the main thread in EmpowerPlantActivity.onCreate cause UI freezes.

• Removed allowMainThreadQueries() from AppDatabase to prevent database operations on the main thread.
• Used ExecutorService to perform database queries and attachment operations in the background in EmpowerPlantActivity.
• Shut down the ExecutorService in onDestroy() to release resources.

This fix was generated by Seer in Sentry, triggered by [email protected]. 👁️ Run ID: 59830

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (c211625) to head (190d2bc).

Files with missing lines	Patch %	Lines
.../vu/android/empowerplant/EmpowerPlantActivity.java	0.00%	9 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #178   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files         15      15           
  Lines        780     786    +6     
  Branches      43      44    +1     
=====================================
- Misses       780     786    +6     

☔ 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.