chore(proxy): sort miners deterministically

Co-Authored-By: Virgil <virgil@lethean.io>

proxy_runtime.go

@@ -4,6 +4,7 @@ import (
 	"crypto/tls"
 	"errors"
 	"net"
+	"sort"
 	"time"
 )
 
@@ -280,6 +281,15 @@ func (p *Proxy) Miners() []*Miner {
 	for _, miner := range p.miners {
 		miners = append(miners, miner)
 	}
+	sort.Slice(miners, func(left int, right int) bool {
+		if miners[left] == nil {
+			return false
+		}
+		if miners[right] == nil {
+			return true
+		}
+		return miners[left].ID() < miners[right].ID()
+	})
 	return miners
 }