Add experimental Lingma remote backend

internal/remote/id.go

@@ -0,0 +1,28 @@
+package remote
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"sync/atomic"
+	"time"
+)
+
+func newUUID() string {
+	var data [16]byte
+	if _, err := rand.Read(data[:]); err != nil {
+		return fmt.Sprintf("fallback-%d", time.Now().UnixNano())
+	}
+	data[6] = (data[6] & 0x0f) | 0x40
+	data[8] = (data[8] & 0x3f) | 0x80
+	return fmt.Sprintf("%x-%x-%x-%x-%x", data[0:4], data[4:6], data[6:8], data[8:10], data[10:16])
+}
+
+func newHexID() string {
+	var data [16]byte
+	if _, err := rand.Read(data[:]); err != nil {
+		seq := atomic.AddUint64(&hexCounter, 1)
+		return fmt.Sprintf("fallback%x%x", time.Now().UnixNano(), seq)
+	}
+	return hex.EncodeToString(data[:])
+}