feat(platform-api): enforce request timeout

vehicle-data-platform/apps/api/internal/config/config.go

@@ -3,6 +3,7 @@ package config
 import (
 	"os"
 	"strconv"
+	"time"
 )
 
 type Config struct {
@@ -18,6 +19,7 @@ type Config struct {
 	TDengineDatabase string
 	CapacityCheckBin string
 	AuthToken        string
+	RequestTimeout   time.Duration
 }
 
 func Load() Config {
@@ -34,6 +36,7 @@ func Load() Config {
 		TDengineDatabase: env("TDENGINE_DATABASE", "lingniu_vehicle_ts"),
 		CapacityCheckBin: os.Getenv("CAPACITY_CHECK_BIN"),
 		AuthToken:        os.Getenv("AUTH_TOKEN"),
+		RequestTimeout:   time.Duration(envInt("REQUEST_TIMEOUT_MS", 5000)) * time.Millisecond,
 	}
 }