Refactor update...() methods

[Tigrov]

• Fix bug: ActiveRecord::save() without changes should return true;
• Fix bug with return type of ActiveRecord::getOldPrimaryKey() method;
• Remove redundant false return type in ActiveRecordInterface::update() method;
• Refactor BaseActiveRecord::updateAttributes();
• Refactor BaseActiveRecord::updateInternal();
• Refactor BaseActiveRecord::updateCounters().

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

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (2ba318b) 87.70% compared to head (f3648db) 88.02%.

Files	Patch %	Lines
src/BaseActiveRecord.php	92.30%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #282      +/-   ##
============================================
+ Coverage     87.70%   88.02%   +0.31%     
+ Complexity      595      587       -8     
============================================
  Files             7        7              
  Lines          1326     1319       -7     
============================================
- Hits           1163     1161       -2     
+ Misses          163      158       -5     

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[what-the-diff]

PR Summary

• Refined issue handling in psalm.xml
  The addition of an issueHandlers section helps suppress the MixedAssignment error level, increasing code inspection efficacy.
• Standardized return types in ActiveRecord.php and BaseActiveRecord.php
  Several methods in these two files have had their return types altered. Specifically, certain methods which originally could return false|int now strictly return int, or have specific conditions guiding their output. This increases the predictability of these methods' behaviours.
• Improved documentation in ActiveRecordInterface.php and BaseActiveRecord.php
  Several methods in these files now have documented return types, making it easier for developers to understand what to expect upon the method's execution.
• Updated attribute handling in BaseActiveRecord.php
  The updateAttributes method now employs setAttribute to update attribute values, leading to improved handling and functionality of attributes.
• Enhanced error handling in BaseActiveRecord.php
  The updateInternal method now throws a StaleObjectException, rather than returning false. This makes error capturing and handling less ambiguous and more efficient.
• New test case in ActiveRecordTest.php
  Added testSaveWithoutChanges, a new test case for Agile automation testing processes. This increases overall test coverage, ensuring that the function works as expected, even in edge case scenarios.