P4 hazards: food spoilage with rot speed setting, smoking rack and salt, food poisoning, harsher blizzards, hard winters with lake ice, lightning on trees, snow on roofs (protocol 11)

docs/ROADMAP.md

@@ -42,6 +42,7 @@ Detailed plan in `docs/SURVIVAL_DESIGN.md` (phases M1a–M1d).
 - [x] The wolf moon and the alpha: breaks wooden doors, iron-banded doors hold, alpha pelt and cloak *(P3, part 1)*
 - [x] The bear: raids unattended food, palisades and closed huts keep it out, bear hide rug, bear fat *(P3, part 2)*
 - [x] Crows and foxes steal food left out; the barrow, its guards, the coffin and key pieces *(P3, part 3)*
+- [x] Hazards: food spoilage (rot speed setting), smoking rack and salt, food poisoning, harsher blizzards, hard winters, lightning on trees *(P4)*
 - [ ] **Iron, stone building and new adversaries**: iron nuggets and ore,
       smelting and a forge, iron tools and durability, cut-stone building,
       an alpha wolf, a bear, a barrow with guards, spoilage and blizzards