feat: Add indexes on reading.device_info_id and event.device_info_id

[FelixTing]

fix: #5333

Reading and event queries often join with the device_info table by device_info_id. Adding indexes on reading.device_info_id and event.device_info_id improves query performance.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.17%. Comparing base (dd9e956) to head (d87a39f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5334   +/-   ##
=======================================
  Coverage   21.17%   21.17%           
=======================================
  Files         285      285           
  Lines       20958    20958           
=======================================
  Hits         4438     4438           
  Misses      16167    16167           
  Partials      353      353           

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[judehung]

LGTM