Add unattended campfire risk state

Docs/TechnicalDesignDocument.md

@@ -337,6 +337,14 @@ or stop the loop on clients, while the authoritative server multicasts ignition
 and extinguish events so the audio follows the same state changes as light,
 smoke, warmth, fuel, and persistence.
 
+Campfires now track unattended and poorly maintained fire risk on the server.
+`AAgrarianCampfire` records lit duration, seconds since maintenance, whether the
+area has been cleared, whether the fire is contained, and a replicated
+`FireRiskScore`. Risk grows after a fire has been left unattended, grows faster
+when excessive fuel is burning, and is reduced by maintenance, cleared area,
+containment, and wet weather. This first risk layer does not yet ignite nearby
+vegetation or structures; later 0.1.P items consume the replicated risk score.
+
 Campfires expose native extinguish logic through `AAgrarianCampfire::Extinguish`.
 Extinguishing clears remaining fuel, turns off replicated lit state, and reuses
 the same visual update path as natural fuel depletion.