Introduce EU7B v8 bake with global PROT chunk and v12 section payloads
(solo MODL + compact inst records, per-chunk solo/inst tables). Reader
parses v12 with chunked decode and v11→flat fallback; fix chunk blob
layout to write solo blocks before inst records.
Streaming: add unload keep-radius hysteresis on deceleration, ring-deficit
urgent drain, higher cold-mesh/apply budgets, and smarter warm-prefix
preload. Move UMES mesh prefetch to the main thread and route PACK apply
through ensure_pack_mesh_in_session_cache to avoid GetModel races on
Global.asCurrentTexturePath; harden MdlMngr texture-path trimming.
Rebake root scenario .eu7 files to get v12; existing v7–v11 packs remain
readable.
Bake deduplicated section texture lists (UTEX) and read them at runtime so
texture warm/prefetch no longer scans every instance. Evict PACK sections
outside a 16 km keep ring and cap mesh/nodedata/texture warm caches to stop
RAM and apply cost from growing without bound during long fast camera flight.
- Bake v11 (format=4): UMES + UTEX + CHNK; mesh/texture ordering by frequency
- Runtime: incremental UTEX warm, adaptive apply slices, preempt/catchup tuning
- Unload: track instances per section, Region erase, pack pool release
- LRU: mesh/nodedata (2000, ref-counted), warmed textures (2048)
- Bench/diagnostics: unload and cache eviction counters
- Fix pack instance erase in Region; resolve duplicate helper symbols
