6.4.1

CI fixes only. No functional or dependency changes since 6.4.0.

Coding Standards job

The job failed on 6.4.0 even though phpcs reported no violations — the checkstyle report it produced was completely empty.

The reusable workflow pipes that report into cs2pr. Version 6.0.0 ran phpcs -q --no-colors --report=checkstyle | cs2pr, but 15.1.0 dropped the -q. Without it, two things land on stdout ahead of the XML:

• progress output, enabled by our own <arg value="nps"/>
• the deprecated-sniff banner that doctrine/coding-standard prints

cs2pr then cannot parse its input and exits 2.

Changing that argument from nps to nqs runs phpcs quietly regardless of how the workflow invokes it, leaving stdout as pure XML.

Documentation workflow

Removed — the docs are not maintained in this fork. The docs/ directory itself is unchanged.