feat(proxyd): make max batch size hard limit 1000 and default 100 (#7719)

            * feat: make max batch size hard limit 1000 and default 100

* nit: rename const
  
  

proxyd/server.go

@@ -34,7 +34,8 @@ const (
 	ContextKeyAuth               = "authorization"
 	ContextKeyReqID              = "req_id"
 	ContextKeyXForwardedFor      = "x_forwarded_for"
-	MaxBatchRPCCallsHardLimit   = 100
+	DefaultMaxBatchRPCCallsLimit = 100
+	MaxBatchRPCCallsHardLimit    = 1000
 	cacheStatusHdr               = "X-Proxyd-Cache-Status"
 	defaultRPCTimeout            = 10 * time.Second
 	defaultBodySizeLimit         = 256 * opt.KiB
@@ -108,7 +109,11 @@ func NewServer(
 		maxUpstreamBatchSize = defaultMaxUpstreamBatchSize
 	}
 
-	if maxBatchSize == 0 || maxBatchSize > MaxBatchRPCCallsHardLimit {
+	if maxBatchSize == 0 {
+		maxBatchSize = DefaultMaxBatchRPCCallsLimit
+	}
+
+	if maxBatchSize > MaxBatchRPCCallsHardLimit {
 		maxBatchSize = MaxBatchRPCCallsHardLimit
 	}