Fix Fill Capacity exceeding DC slot limit due to double-counted failed racks

computeRacksFailed was incremented on production failure and never decremented
when repaired racks came back online, while repair cohorts also tracked the
same racks. This caused usedSlots to inflate past the DC capacity over time.

Fix: derive computeRacksFailed from repair cohorts each tick instead of
maintaining it as a running counter. Include repair cohorts in pipeline slot
accounting so all racks are counted exactly once. Also fixes power limit in
fillDCToCapacity to only count online racks (pipeline racks don't draw power).

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

packages/game-engine/src/systems/infrastructureSystem.ts

@@ -195,7 +195,6 @@ export function processInfrastructure(state: GameState): InfraTickResult {
         }
 
         let computeRacksOnline = dc.computeRacksOnline;
-        let computeRacksFailed = dc.computeRacksFailed;
         let dcRepairCosts = 0;
 
         // Process retrofit
@@ -349,7 +348,6 @@ export function processInfrastructure(state: GameState): InfraTickResult {
           const prodFailures = binomialSample(computeRacksOnline, effectiveRate);
           if (prodFailures > 0) {
             computeRacksOnline -= prodFailures;
-            computeRacksFailed += prodFailures;
             const repairCost = sku.baseCost * sku.repairCostFraction * prodFailures;
             dcRepairCosts += repairCost;
 
@@ -400,12 +398,15 @@ export function processInfrastructure(state: GameState): InfraTickResult {
         // Compute aggregates for this DC
         const location = LOCATION_CONFIGS[cluster.locationId];
         const tierConfig = DC_TIER_CONFIGS[dc.tier];
-        const totalRacksInDc = computeRacksOnline + computeRacksFailed;
-        const netSlots = networkSlotsRequired(computeRacksOnline);
         const pipelineRacks = updatedCohorts
-          .filter(c => c.stage !== 'decommission' && c.stage !== 'repair')
+          .filter(c => c.stage !== 'decommission')
           .reduce((sum, c) => sum + c.count, 0);
-        const usedSlots = totalRacksInDc + netSlots + pipelineRacks;
+        const computeRacksFailed = updatedCohorts
+          .filter(c => c.stage === 'repair')
+          .reduce((sum, c) => sum + c.count, 0);
+        const totalRacksInDc = computeRacksOnline + pipelineRacks;
+        const netSlots = networkSlotsRequired(computeRacksOnline + pipelineRacks);
+        const usedSlots = computeRacksOnline + pipelineRacks + netSlots;
 
         let usedPowerKW = 0;
         let dcFlops = 0;