Graham McIntire 55d001d9f8 Add fork()-based process isolation for SNMP operations ... Each SNMP GET/WALK now runs in a forked child process. If libnetsnmp triggers a SIGSEGV or other fatal signal, only the child dies - the parent agent logs the crash and continues operating for all other devices. Key changes: - C helper: snmp_get_isolated() and snmp_walk_isolated() using fork+pipe pattern with 60s alarm watchdog and mutex-serialized forks - Rust: IsolationMode enum (Fork/Direct) controlled by TOWEROPS_SNMP_ISOLATION env var, defaults to Fork - New CrashRecovered error variant with signal info and logging - Device poller logs crash recovery events at error level - Startup logs active isolation mode Set TOWEROPS_SNMP_ISOLATION=direct to disable isolation for debugging.		2026-02-10 16:12:41 -06:00
..
config.toml	Add fork()-based process isolation for SNMP operations	2026-02-10 16:12:41 -06:00