FerroGate v2026.08.23.6

Changes

• keep official model prices as the tenant billing baseline
• apply provider cost multipliers only to cost-aware routing and operator margin analytics
• publish a v2 shared catalog snapshot so stale cost-adjusted prices cannot survive rollout
• hide supplier economics from tenant-scoped billing reads

Validation

• gateway: 205 files / 3237 tests, 26 rate-limit tests, 50 tenancy tests
• control plane: 92 files / 1293 tests
• gateway and control-plane typechecks
• Biome, diff check, and focused billing/catalog tests