Fix psalm issues

[Tigrov]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	-

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2964f96) 98.01% compared to head (e7506eb) 98.01%.

❗ Current head e7506eb differs from pull request most recent head 82cbc83. Consider uploading reports for the commit 82cbc83 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #292   +/-   ##
=========================================
  Coverage     98.01%   98.01%           
  Complexity      208      208           
=========================================
  Files            15       15           
  Lines           604      604           
=========================================
  Hits            592      592           
  Misses           12       12           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[what-the-diff]

PR Summary

• Enhanced Safety in Command File
  Additional checks have been implemented in the Command.php file to verify if the table schema and primary keys are defined before proceeding with any operations.
• Improved Null Check in DDLQueryBuilder
  More stringent null-checks have been added to the DDLQueryBuilder.php file for increased safety during query building phase.
• Upgraded Dsn File Safety Measures
  The Dsn.php file now includes an extra layer of validation to ensure a non-empty, non-null database name before initiating any kind of actions.
• Added Quantity Validation in DMLQueryBuilder and Quoter
  Both DMLQueryBuilder.php and Quoter.php files now tend to check for more than zero entries before execution for better efficiency.
• Enhanced Null Check in Schema
  The Schema.php file now employs more rigorous null-checks to increase overall system stability.