feat(fusion_accounting_assets): Phase 3 skeleton + plan

50-task plan to replace Enterprise account_asset module:
- CORE scope: 3 depreciation methods (straight-line, declining-balance, units-of-production)
- HYBRID engine: shared primitives + persisted asset/category/disposal/anomaly models
- AI augmentation: utilization anomaly detection + LLM-suggested useful life
- Full lifecycle: draft -> running -> paused -> disposed
- Coexists with Enterprise (group_fusion_show_when_enterprise_absent)
- Same V19 conventions + test pyramid + perf-budget discipline as Phases 1-2

Skeleton: empty manifest + dirs + icon. Tasks 3-50 add the substance.
Made-with: Cursor

fusion_accounting_assets/security/ir.model.access.csv

@@ -0,0 +1 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink