[Bug?]: yarn 4 logFilters is unable to filter most messages

[ssbarnea]

Self-service

• I'd be willing to implement a fix

Describe the bug

Despite logFilters being documented as a way to tune the verbosity of yarn, it seems that most of the filtering does not function at all and the messages are still displayed.

I even used alternatives ways like using pattern, still no way to get rid of messages like the ones seen in the output.

# .yarnrc.yml
yarnPath: .yarn/releases/yarn-4.1.1.cjs
logFilters:
  - code: YN0000
    level: discard

$ yarn
➤ YN0000: · Yarn 4.1.1
➤ YN0000: ┌ Resolution step
➤ YN0000: └ Completed
➤ YN0000: ┌ Fetch step
➤ YN0000: └ Completed
➤ YN0000: ┌ Link step
➤ YN0000: └ Completed
➤ YN0000: · Done in 0s 41ms

To reproduce

• yarn init -2
• edit .yarnrc.yml to add some filter
• run yarn, see that filtering does not happen

Environment

System:
    OS: macOS 14.4.1
    CPU: (10) arm64 Apple M1 Max
  Binaries:
    Node: 20.6.1 - /private/var/folders/32/1xrphgzd4xv777syxjtkpdw80000gn/T/xfs-ec7f8757/node
    Yarn: 4.1.1 - /private/var/folders/32/1xrphgzd4xv777syxjtkpdw80000gn/T/xfs-ec7f8757/yarn
    npm: 10.3.0 - ~/.asdf/plugins/nodejs/shims/npm

Additional context

Sample repository to demonstrate the bug at https://github.com/ssbarnea/bug-yarn

[rally25rs]

It looks like this was built into the original logFilters work:
(YN0000 is MessageName.UNNAMED)
https://github.com/yarnpkg/berry/pull/1907/files#diff-05cad9b7b804b027f333df2ab2a9abded894b7364d43b6e3a17d9e4d24a8e1a1R314-R315

And might have been intentional, based on: #1907 (comment)