fix: invariant entries have 0 timestamp

src/database/entry.rs

@@ -126,7 +126,7 @@ impl TryFrom<&InvariantEntry> for Entry {
             attribute: invariant.attribute.clone(),
             value: invariant.value.clone(),
             provenance: "INVARIANT".to_string(),
-            timestamp: chrono::Utc::now().naive_utc(), // ?
+            timestamp: NaiveDateTime::from_timestamp_opt(0, 0).unwrap(),
         })
     }
 }