[vjik]

Summary by Sourcery

Switch mutation testing to Infection while simplifying the stream size calculation.

Enhancements:

• Switch mutation testing to the standard Infection package and workflow, removing the Roave static-analysis plugin.
• Use null-coalescing assignment for lazy stream content-size calculation.

CI:

• Update the mutation-testing workflow and configure it to ignore mutation score indicators without mutations.

Documentation:

• Update mutation-testing documentation to use the Infection command directly.

Chores:

• Replace the Roave Infection static-analysis dependency with Infection in development dependencies.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR adopts the standard Infection dependency, CI workflow, configuration, and documentation in place of the Roave integration, while simplifying StringStream's lazy size initialization with equivalent behavior.

File-Level Changes

Change	Details	Files
Migrated mutation testing from the Roave integration to Infection's standard workflow.	Replaced the reusable CI workflow with the standard Infection workflow. Added Infection as a development dependency and removed the Roave static-analysis plugin. Configured CI to ignore mutation-score indicators with no surviving mutations. Updated the documented local command to invoke Infection directly.	.github/workflows/mutation.yml composer.json docs/internals.md
Simplified lazy content-size initialization without changing StringStream behavior.	Replaced the explicit null check and assignment with null-coalescing assignment.	src/DataStream/StringStream.php

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.84%. Comparing base (56200bc) to head (659c1c4).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #120      +/-   ##
============================================
- Coverage     99.84%   99.84%   -0.01%     
+ Complexity      251      250       -1     
============================================
  Files            33       33              
  Lines           637      636       -1     
============================================
- Hits            636      635       -1     
  Misses            1        1              

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

Sourcery assessment

Approved.

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