engine: persist the incident ring (LOGSEARCH) across restarts via a periodic + on-shutdown snapshot event, mirroring stat-counter persistence

src/engine/db/mod.rs

@@ -350,6 +350,10 @@ pub struct NetData {
     pub stats: std::collections::BTreeMap<String, u64>,
     // Persisted per-channel BOTSTATS activity: (channel, lines, top talkers).
     pub chan_stats: ChanStats,
+    // Persisted snapshot of the recent-incident ring (OperServ LOGSEARCH) and its
+    // id counter, so the moderation trail survives a restart.
+    pub incidents: Vec<(String, u64, String)>,
+    pub incident_seq: u64,
 }
 
 // A session-limit exception: an IP-mask glob and the session allowance for IPs
@@ -1273,6 +1277,12 @@ impl Db {
                 channels: self.net.chan_stats.clone(),
             });
         }
+        if !self.net.incidents.is_empty() {
+            snapshot.push(Event::IncidentsSet {
+                incident_seq: self.net.incident_seq,
+                incidents: self.net.incidents.clone(),
+            });
+        }
         for host in &self.host_cfg.offers {
             snapshot.push(Event::VhostOfferAdded { host: host.clone() });
         }