[Try #2] Fix leakage of promises

[MahdiBM]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 86.20690% with 4 lines in your changes missing coverage. Please review.

Project coverage is 55.40%. Comparing base (d18b137) to head (750c706).

Files	Patch %	Lines
...urces/PostgresNIO/New/PostgresChannelHandler.swift	57.14%	3 Missing ⚠️
Sources/PostgresNIO/New/PSQLTask.swift	95.45%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #498      +/-   ##
==========================================
+ Coverage   55.29%   55.40%   +0.10%     
==========================================
  Files         127      127              
  Lines       10162    10191      +29     
==========================================
+ Hits         5619     5646      +27     
- Misses       4543     4545       +2     

Files	Coverage Δ
Sources/PostgresNIO/New/PSQLTask.swift	84.21% <95.45%> (+7.06%)	⬆️
...urces/PostgresNIO/New/PostgresChannelHandler.swift	83.36% <57.14%> (-0.33%)	⬇️

... and 2 files with indirect coverage changes