feat: build vehicle data platform and production pipeline

go/vehicle-gateway/internal/history/schema.go

@@ -54,6 +54,7 @@ func SchemaStatements(database string) []string {
   latitude DOUBLE,
   altitude_m DOUBLE,
   speed_kmh DOUBLE,
+  soc_percent DOUBLE,
   direction_deg INT,
   alarm_flag BIGINT,
   status_flag BIGINT,
@@ -64,3 +65,13 @@ func SchemaStatements(database string) []string {
 )`,
 	}
 }
+
+// SchemaMigrationStatements contains additive TDengine changes that must also
+// be applied to an already existing stable. The writer treats duplicate-column
+// errors as success so startup remains idempotent across releases.
+func SchemaMigrationStatements(database string) []string {
+	if database == "" {
+		database = DefaultDatabase
+	}
+	return []string{"ALTER STABLE " + database + ".vehicle_locations ADD COLUMN soc_percent DOUBLE"}
+}