add rotation

README.md

@@ -47,6 +47,13 @@ For UDP `514`, the script starts only the listener command with `sudo`:
 FGAI_SYSLOG_PORT=514 ./start.sh
 ```
 
+The syslog receiver rotates the active JSONL input at 25 MB by default. Rotated
+files are gzip-compressed and 14 archives are retained. Override this when needed:
+
+```bash
+FGAI_LOG_ROTATE_BYTES=$((100 * 1024 * 1024)) FGAI_LOG_ROTATE_COUNT=30 ./start.sh restart
+```
+
 Analyze local logs:
 
 ```bash