Added run manifest scaffolding and helpers

internal/manifest/run_manifest_test.go

@@ -0,0 +1,50 @@
+package manifest
+
+import (
+	"testing"
+	"time"
+)
+
+func TestRunManifestStageMarkHelpers(t *testing.T) {
+	rm := NewRun("2026-05-03", "forsaken", "20260517T000000Z-abcdef12", false, []string{"prepare"}, time.Date(2026, 5, 3, 10, 0, 0, 0, time.UTC))
+	if rm.Status != RunManifestStatusRunning {
+		t.Fatalf("status = %q, want %q", rm.Status, RunManifestStatusRunning)
+	}
+
+	runningAt := time.Date(2026, 5, 3, 10, 1, 0, 0, time.UTC)
+	rm.SetStageAction("prepare", RunStageActionRun, runningAt)
+	rm.MarkStageRunning("prepare", runningAt)
+	rm.MarkStageSucceeded("prepare", runningAt.Add(30*time.Second), []ArtifactRecord{
+		{Kind: "input", LocalPath: "inputs/session.yml"},
+	})
+
+	stage := rm.Stages["prepare"]
+	if stage == nil {
+		t.Fatal("prepare stage missing")
+	}
+	if stage.Action != RunStageActionRun {
+		t.Fatalf("action = %q, want %q", stage.Action, RunStageActionRun)
+	}
+	if stage.Status != StatusSucceeded {
+		t.Fatalf("status = %q, want %q", stage.Status, StatusSucceeded)
+	}
+
+	skippedAt := runningAt.Add(1 * time.Minute)
+	rm.SetStageAction("notify", RunStageActionSkip, skippedAt)
+	rm.MarkStageSkipped("notify", skippedAt, "already_succeeded")
+	skipped := rm.Stages["notify"]
+	if skipped == nil {
+		t.Fatal("notify stage missing")
+	}
+	if skipped.Action != RunStageActionSkip {
+		t.Fatalf("action = %q, want %q", skipped.Action, RunStageActionSkip)
+	}
+	if skipped.Status != StatusSkipped {
+		t.Fatalf("status = %q, want %q", skipped.Status, StatusSkipped)
+	}
+
+	rm.MarkSucceeded(skippedAt.Add(10 * time.Second))
+	if rm.Status != RunManifestStatusSucceeded {
+		t.Fatalf("status = %q, want %q", rm.Status, RunManifestStatusSucceeded)
+	}
+}