refactor: deprecate int32 (#7025)

* refactor: deprecate int32

* fix(db): reject legacy user quota schemas at startup

* fix(quota): enforce wallet bounds and saturating billing conversions

* fix(rate-limit): keep count*duration from wrapping int64

* fix: error message

service/quota.go

@@ -3,7 +3,6 @@ package service
 import (
 	"errors"
 	"fmt"
-	"math"
 	"strings"
 	"time"
 
@@ -272,11 +271,16 @@ func CalcOpenRouterCacheCreateTokens(usage dto.Usage, priceData types.PriceData)
 	completionTokens := float64(usage.CompletionTokens)
 	promptCacheReadTokens := float64(usage.PromptTokensDetails.CachedTokens)
 
-	return int(math.Round((cost -
+	value := (cost -
 		totalPromptTokens*quotaPrice +
 		promptCacheReadTokens*(quotaPrice-promptCacheReadPrice) -
 		completionTokens*completionPrice) /
-		(promptCacheCreatePrice - quotaPrice)))
+		(promptCacheCreatePrice - quotaPrice)
+	quota, clamp := common.QuotaRoundChecked(value)
+	if clamp != nil {
+		return -1
+	}
+	return quota
 }
 
 func PostAudioConsumeQuota(ctx *gin.Context, relayInfo *relaycommon.RelayInfo, usage *dto.Usage, extraContent string) {