sonar-scanner-cli: no log output when running scanner

[moonkaktus]

Package: sonar-scanner-cli 8.0.1.6346 epoch 4

Describe the bug:
Running sonar-scanner produces no output — only logback internal
initialization messages are printed, then the process exits silently.

The logback initialization shows:
WARN - Appender named [STDOUT] not referenced. Skipping further processing.
WARN - Appender named [STDERR] not referenced. Skipping further processing.
WARN - Appender named [STDOUT] could not be found. Skipping attachment to Logger[ROOT].

ROOT logger has no appenders and silently swallows all scanner output.

Steps to reproduce:
sonar-scanner -X -Dsonar.qualitygate.wait=true

Expected: full scanner log output to stdout
Actual: no output, job exits with code 0 or 1 with no diagnostics

Notes:
Likely related to logback being bumped to 1.3+ as part of
GHSA-qqpg-mvqg-649v fix (epoch 4). The logback.xml inside
sonarscanner-cli.jar uses appender definitions that are dropped
by logback 1.3+ when not referenced before ROOT logger initialization.