Refactor middleware fallback handler

[olegbaturin]

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

[codecov]

Codecov Report

❌ Patch coverage is 68.42105% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.78%. Comparing base (c7b850e) to head (cdaf6c6).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
config/di-web.php	0.00%	3 Missing ⚠️
src/RequestBodyParser.php	76.92%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #43      +/-   ##
============================================
- Coverage     96.29%   91.78%   -4.52%     
+ Complexity       34       32       -2     
============================================
  Files             3        4       +1     
  Lines            81       73       -8     
============================================
- Hits             78       67      -11     
- Misses            3        6       +3     

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[olegbaturin]

Version with 'Handler' renamed to the 'Action'.

[samdark]

The change is backwards compatibility breaking one.

[olegbaturin]

I'll update readme

[Copilot]

Pull Request Overview

This PR refactors the middleware fallback handler in the RequestBodyParser package, changing from a boolean flag approach to a more flexible handler-based approach for managing parsing errors.

Key changes:

• Removed the ignoreBadRequestBody() method and boolean flag pattern
• Modified the BadRequestHandlerInterface to accept ParserException directly in the handle() method
• Updated constructor to require explicit BadRequestHandlerInterface parameter instead of creating a default instance

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/RequestBodyParser.php	Refactored constructor and error handling logic, removed ignoreBadRequestBody() method
src/BadRequestHandlerInterface.php	Changed interface to pass exception directly to handle() method
src/BadRequestHandler.php	Updated to accept exception parameter in handle() method, removed immutable pattern
src/ParserException.php	Made the exception class final
tests/RequestBodyParsersTest.php	Updated tests to use new handler pattern and removed obsolete test methods
tests/BadRequestHandlerTest.php	Updated tests for new handler signature
tests/ConfigTest.php	Added new test for DI container configuration
config/di-web.php	Added DI configuration for default bad request handler
README.md	Updated documentation for new error handling approach
CHANGELOG.md	Added entry for the refactoring
composer.json	Added yiisoft/di dependency
psalm.xml	Updated configuration settings
phpunit.xml.dist	Added config directory to coverage

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