Redesign infrastructure to hypercluster scale with 4-level hierarchy

Replace flat DataCenter/Rack model with Cluster > Campus > Data Center > Racks
hierarchy. Individual rack entities eliminated in favor of statistical batch
simulation using deployment cohorts. Adds tiered network topology (ToR/agg/core)
with proportional outage model, DC retrofitting, bulk operations, and drill-down
UI navigation with breadcrumbs. First cluster and campus are free to preserve
early game flow. Rebalances starting economy ($600K), funding rounds, and
cohort scaling for hypercluster-scale gameplay.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/game-engine/src/data/achievements.ts

@@ -6,7 +6,7 @@ export const ACHIEVEMENT_DEFINITIONS: AchievementDefinition[] = [
     name: 'First Steps',
     description: 'Build your first data center.',
     icon: 'Server',
-    condition: { field: 'infrastructure.dataCenters.length', operator: 'gte', value: 1 },
+    condition: { field: 'infrastructure.totalDataCenterCount', operator: 'gte', value: 1 },
   },
   {
     id: 'first-model',