fix(connection): add mutex lock for thread-safe access to local connections

Author: flarco

core/dbio/connection/connection_local.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"sort"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/flarco/g"
@@ -79,11 +80,15 @@ var (
 	localConns        ConnEntries
 	localConnsTs      time.Time
 	localConnsExclude string
+	localConnsMux     sync.Mutex
 )
 
 type LocalConnsExclude string
 
 func GetLocalConns(options ...any) ConnEntries {
+	localConnsMux.Lock()
+	defer localConnsMux.Unlock()
+
 	defer func() { localConnsExclude = "" }() // clear if set
 	force := false