Add context timeouts for third-party requests

Avoid hanging a goroutine for a long time.

platform/geocode/by_gid.go

@@ -3,6 +3,7 @@ package geocode
 import (
 	"context"
 	"fmt"
+	"time"
 
 	"github.com/Gleipnir-Technology/nidus-sync/db"
 	"github.com/Gleipnir-Technology/nidus-sync/h3utils"
@@ -11,6 +12,9 @@ import (
 )
 
 func ByGID(ctx context.Context, gid string) (*GeocodeResult, error) {
+	ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
+	defer cancel()
+
 	req := stadia.RequestGeocodeByGID{
 		GIDs: []string{gid},
 	}