fix(modules): Fix postgres deprecation warning.

[surister]

Removed the wait_container_is_ready decorator as per deprecation warning into the new container.waiting_for

[surister]

The string database system is ready to accept connections is valid for all postgres versions from postgres:9 to postgres:18

[surister]

I was testing this thoroughly and sometimes, maybe 1/10 runs this fails, the log successfully emits 'database system is ready...' and the waiting strategy picks it up but still the database is not ready.

<re.Match object; span=(1342, 1388), match='database system is ready to accept connections'>
... we try connect in _connect
ExecResult(exit_code=2, output=b'psql: error: connection to server at "127.0.0.1", port 5432 failed: Connection refused\n\tIs the server running on that host and accepting TCP/IP connections?\n')

Adding a 1s sleep in the _connect makes this go away, the funny thing is that postgres says it's ready when it's actually not.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.78%. Comparing base (bb646e9) to head (f0a2ee6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #883   +/-   ##
=======================================
  Coverage   79.78%   79.78%           
=======================================
  Files          14       14           
  Lines        1182     1182           
  Branches      184      184           
=======================================
  Hits          943      943           
  Misses        197      197           
  Partials       42       42           

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[surister]

Pipeline failing due to missing import (bad cherrypicking on my part 🥲) Anyway, will close this and properly migrate the module once #892 is finished.