fix: syslog parser TS strict null check, deploy script

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

bastion/src/bastion/src/services/syslog-listener.ts

@@ -18,7 +18,7 @@ function parseSyslogLine(raw: string): { program: string; message: string } {
   // Try to extract program and message after the timestamp + hostname
   // RFC 3164: "Mon DD HH:MM:SS HOSTNAME PROGRAM[PID]: MESSAGE"
   const match = noPri.match(/^\w+\s+\d+\s+[\d:]+\s+\S+\s+(\S+?)(?:\[\d+\])?:\s*(.*)/);
-  if (match) {
+  if (match?.[1] && match[2] !== undefined) {
     return { program: match[1], message: match[2] };
   }
   // Fallback: just return the whole line