Fix psycopg as_string()

[TimPansino]

Overview

• Fix for as_string() in psycopg with no arguments causing a crash in instrumentation.

Related Github Issue

Closes #1502

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	6		0	0	0.78s
✅ MARKDOWN	markdownlint	7	0	0	0	1.05s
✅ MARKDOWN	markdown-link-check	7		0	0	22.48s
✅ PYTHON	ruff	938	0	0	0	0.99s
✅ PYTHON	ruff-format	938	0	0	0	0.34s
✅ YAML	prettier	13	0	0	0	1.4s
✅ YAML	v8r	13		0	0	6.64s
✅ YAML	yamllint	13		0	0	0.6s

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.57%. Comparing base (66348e1) to head (cca6ccf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1508   +/-   ##
=======================================
  Coverage   81.57%   81.57%           
=======================================
  Files         206      206           
  Lines       23689    23689           
  Branches     3753     3753           
=======================================
+ Hits        19324    19325    +1     
- Misses       3102     3103    +1     
+ Partials     1263     1261    -2     

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