"system" sub-command not catching some keywords

[kmoppel]

For example "listening" + "was shut down" lines not reported compared to Go version

./pgweasel-go system testdata/pgbench_large.log.gz
2025-08-27 01:24:18.975 EEST [3863217] LOG:  starting PostgreSQL 16.10 (Ubuntu 16.10-1.pgdg24.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, 64-bit
2025-08-27 01:24:18.975 EEST [3863217] LOG:  listening on IPv4 address "127.0.0.1", port 54316
2025-08-27 01:24:18.978 EEST [3863217] LOG:  listening on Unix socket "/tmp/.s.PGSQL.54316"
2025-08-27 01:24:18.982 EEST [3863221] LOG:  database system was shut down at 2025-08-27 01:23:49 EEST
2025-08-27 01:24:18.987 EEST [3863217] LOG:  database system is ready to accept connections

./pgweasel  system testdata/pgbench_large.log.gz
2025-08-27 01:24:18.987 EEST [3863217] LOG:  database system is ready to accept connections