Enhance logging and add policy test client

- Refactored logOutput function to trace-log stdout and stderr lines for better debugging.
- Introduced a new policy test client in cmd/policytest/main.go to publish events and check policy responses.
- Added a script to run the policy test, ensuring proper cleanup and error handling.
- Updated policy event processing to ensure newline-terminated JSON for compatibility with shell-readers.

scripts/run-policy-test.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+set -euo pipefail
+
+# Config
+PORT=${PORT:-34567}
+URL=${URL:-ws://127.0.0.1:${PORT}}
+LOG=/tmp/orly-policy.out
+PID=/tmp/orly-policy.pid
+DATADIR=$(mktemp -d)
+
+cleanup() {
+  trap - EXIT
+  if [[ -f "$PID" ]]; then
+    kill -INT "$(cat "$PID")" 2>/dev/null || true
+    rm -f "$PID"
+  fi
+  rm -rf "$DATADIR"
+}
+trap cleanup EXIT
+
+echo "Building relay and test client..."
+go build -o orly .
+go build -o cmd/policytest/policytest ./cmd/policytest
+
+echo "Starting relay on ${URL} with policy enabled (data dir: ${DATADIR})..."
+ORLY_DATA_DIR="$DATADIR" \
+ORLY_PORT=${PORT} \
+ORLY_POLICY_ENABLED=true \
+ORLY_ACL_MODE=none \
+ORLY_LOG_LEVEL=trace \
+./orly >"$LOG" 2>&1 & echo $! >"$PID"
+
+sleep 1
+if ! ps -p "$(cat "$PID")" >/dev/null 2>&1; then
+  echo "Relay failed to start; logs:" >&2
+  sed -n '1,200p' "$LOG" >&2
+  exit 1
+fi
+
+echo "Running policy test against ${URL}..."
+set +e
+out=$(cmd/policytest/policytest -url "${URL}" 2>&1)
+rc=$?
+set -e
+echo "$out"
+
+# Expect rejection; return 0 if we saw REJECT, else forward exit code
+if grep -q '^REJECT:' <<<"$out"; then
+  exit 0
+fi
+exit $rc
+
+