Restore --debug for PHPUnit run under Turso

Removing --debug in commit ce22919 caused PHPUnit to crash mid-run
(at ~504/596 tests, ~84% complete) instead of completing the suite
and segfaulting only during shutdown's GC. Per-test --debug logging
forces I/O flushes that prevent Turso state from accumulating to
the point where the in-process VM faults.

Keep the stdout-summary fallback added in ce22919: PHPUnit's JUnit
flush still races Turso's shutdown SIGSEGV, so the harness needs
to derive pass/fail from stdout when the XML is empty.

Author: JanJakes

.github/workflows/phpunit-tests-turso.yml

@@ -1751,8 +1751,12 @@ jobs:
           # they tokenise/parse a 5.7 MB fixture in a single loop and run
           # well over 10 min under LD_PRELOAD (not a Turso issue).
           skip_regex='^(?!WP_MySQL_Server_Suite_).+'
+          # Keep --debug: per-test logging forces I/O flushes that prevent
+          # Turso from accumulating state which crashes PHPUnit mid-run
+          # (without --debug, the run aborts around 84% complete).
           timeout --kill-after=10 600 \
               php ./vendor/bin/phpunit -c ./phpunit.xml.dist \
+                  --debug \
                   --filter "$skip_regex" \
                   --log-junit /tmp/phpunit-turso.xml \
                   | tee /tmp/phpunit-turso.stdout