Cryptid Core Co Field Operations

0.7.0-b — Stage 7b: Deer Casts + Jungle Rework + Structure Expansion + Crash Fix

• REWORK: Jungle Bigfoot (from 7a) split in two. The green morph is now   "Swamp Bigfoot" and lives in swamps + mangrove swamps. The new Jungle   Bigfoot is a brown Bigfoot with vines draped across shoulders, chest,   and head — lives in jungles / sparse jungle / bamboo jungle. Elders   are still Silver. Saved worlds keep their variant bytes intact.
• NEW: deer footprints — every deer stamps variant-specific hoof prints   on the same 5-block stride as Bigfoots.
• NEW: deer plaster casts — pour plaster on a hoof print, wait 30s, collect   a variant-specific Deer Footprint Cast trophy.
• NEW: cast collection now split into Bigfoot / Deer / Originals sub-tabs   inside the Casts view.
• CHANGE: all four buildings (campsite, boat house, field station,   abandoned station) now spawn across all forest-type biomes.
• CHANGE: guaranteed White Bigfoots only spawn at boat houses in birch +   snowy biomes now. Boat houses elsewhere generate empty.
• CHANGE: field station cabin, campsite cabin, and boat house shack got   a first pass of porches, roofs, and window trims. Full interior polish   is still pending.
• FIX: chunk-load crash from far-chunk writes in older structure features.   Retrofitted 126 write sites across five features with the same bounds