Support dbStats

[ekalinin]

Closes #162.

[codecov]

Codecov Report

Merging #232 (4e48f51) into main (b8683f3) will increase coverage by 0.40%.
The diff coverage is 80.95%.

@@            Coverage Diff             @@
##             main     #232      +/-   ##
==========================================
+ Coverage   48.26%   48.67%   +0.40%     
==========================================
  Files         107      108       +1     
  Lines        4985     5048      +63     
==========================================
+ Hits         2406     2457      +51     
- Misses       2164     2172       +8     
- Partials      415      419       +4     

Impacted Files	Coverage Δ
internal/handlers/shared/msg_dbstats.go	75.00% <75.00%> (ø)
internal/pg/pool.go	74.75% <88.00%> (+1.87%)	⬆️
internal/handlers/handler.go	53.76% <100.00%> (+0.50%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b8683f3...4e48f51. Read the comment docs.

[AlekSi]

Thank you!