debug: test if HF captures stdout/stderr from entrypoint at all

scripts/entrypoint.sh

@@ -7,6 +7,11 @@
 # ─────────────────────────────────────────────────────────────────────
 set -e
 
+# Diagnostic: test if HF captures ANY container output
+echo "=== [stdout] ENTRYPOINT PID=$$ $(date -u) ==="
+echo "=== [stderr] ENTRYPOINT PID=$$ $(date -u) ===" >&2
+python3 -c "import sys; print('=== [py-stdout] PYTHON TEST ===', flush=True); print('=== [py-stderr] PYTHON TEST ===', file=sys.stderr, flush=True)"
+
 LOGFILE="/var/log/huggingrun.log"
 touch "$LOGFILE"