fix(cli): harden run parsing and improve throughput metrics

cmd/stroppy/commands/help/topic_envs.go

@@ -150,7 +150,18 @@ CONFIG FILE ALTERNATIVE
 
 DEBUG: TRACING ENV RESOLUTION
 
-  To see which env vars are applied and where they came from:
+  Normal run logs show -e/config env entries that were applied:
+
+    stroppy run tpcc/tx -e load_workers=8
+
+    INFO script_runner Applied script env {"source":"cli","env":["LOAD_WORKERS=8"]}
+
+  If an applied env key is not declared by the workload's ENV() calls, Stroppy
+  warns so typos are visible:
+
+    WARN script_runner Script env is not declared by workload {"keys":["LOAD_WROKERS"]}
+
+  To inspect skipped env entries and precedence decisions:
 
     LOG_LEVEL=debug stroppy run <script>
 

cmd/stroppy/commands/k6signals_test.go

@@ -8,6 +8,8 @@ import (
 
 	"github.com/stretchr/testify/require"
 	"go.k6.io/k6/cmd/state"
+
+	"github.com/stroppy-io/stroppy/internal/runner"
 )
 
 func sendInt(t *testing.T) {
@@ -69,3 +71,22 @@ func TestInterceptMiddleware(_ *testing.T) {
 	// SignalStop should not panic and should clean up.
 	gs.SignalStop(ch)
 }
+
+func TestK6SubcommandScopesExitCapture(t *testing.T) {
+	called := false
+	gs := &state.GlobalState{OSExit: func(int) { called = true }}
+
+	K6Subcommand(gs)
+	gs.OSExit(1)
+	require.True(t, called)
+
+	called = false
+
+	stop := runner.BeginK6ExitCapture()
+	defer stop()
+
+	gs = &state.GlobalState{OSExit: func(int) { called = true }}
+	K6Subcommand(gs)
+	gs.OSExit(1)
+	require.False(t, called)
+}

cmd/stroppy/commands/root.go

@@ -85,7 +85,10 @@ func Root() *cobra.Command {
 
 func K6Subcommand(gs *state.GlobalState) *cobra.Command {
 	inteceptInteruptSignals(gs)
-	gs.OSExit = runner.OSExit // handles exit code
+
+	if runner.K6ExitCaptureEnabled() {
+		gs.OSExit = runner.OSExit
+	}
 
 	return rootCmd
 }