Add server authoritative fire spread state

AGRARIAN_DEVELOPMENT_ROADMAP.md

@@ -840,7 +840,7 @@ Target deliverable: A small group can join a server, spawn into one biome, gathe
 - [x] Add unattended and poorly maintained fire risk for campfires and other open-flame sources. Added server-side campfire risk state for lit duration, seconds since maintenance, cleared area, containment, high fuel, wet weather mitigation, and a replicated `FireRiskScore` that later ignition/spread systems can consume.
 - [x] Add grass and forest ignition checks from irresponsible fire placement, wind/weather, dry fuel, nearby vegetation, and burn duration. Added foliage fuel counting, campfire vegetation ignition risk scores, grass/brush and forest ignition flags, and weather/wind/burn-duration modifiers so unsafe fire placement near dry fuel can now become a server-authoritative ignition risk.
 - [x] Add shelter/structure ignition risk when fires are placed too close to primitive shelters, wood piles, flammable crafting stations, or settlement objects. Added campfire structure ignition risk for nearby primitive shelters and flammable wood/fiber resource nodes, with containment, burn-duration, weather/wind, and fire-risk modifiers before a replicated structure ignition flag is set.
-- [ ] Add server-authoritative fire spread rules for grass, brush, trees, shelters, and other burnable actors, including fuel, distance, wind, weather, and suppression hooks.
+- [x] Add server-authoritative fire spread rules for grass, brush, trees, shelters, and other burnable actors, including fuel, distance, wind, weather, and suppression hooks. Added replicated grass, forest, and structure fire intensities plus active spread radius that grow only on the server from nearby fuel, ignition distance, wind/weather, and a suppression-pressure hook for later rain, carried water, dirt/sand, firebreaks, and tools.
 - [ ] Add fire maintenance gameplay so watched, cleared, contained, or extinguished fires are safe, while neglected fires can become dangerous.
 - [ ] Add fire suppression hooks for rain, water carrying, dirt/sand, cleared firebreaks, and future firefighting tools.
 - [ ] Persist active grass, forest, and structure fires across save/load without corrupting world state.