feat(orchestrator): thread run trigger; breaker on scheduled runs with errors

internal/orchestrator/breaker_test.go

@@ -0,0 +1,21 @@
+package orchestrator
+
+import "testing"
+
+func TestShouldBreak(t *testing.T) {
+	cases := []struct {
+		trigger string
+		errs    int64
+		want    bool
+	}{
+		{"scheduled", 2, true},  // scheduled run with errors trips the breaker
+		{"scheduled", 0, false}, // scheduled run, clean — no break
+		{"manual", 5, false},    // manual run never trips the breaker
+		{"manual", 0, false},
+	}
+	for _, c := range cases {
+		if got := shouldBreak(c.trigger, c.errs); got != c.want {
+			t.Fatalf("shouldBreak(%q,%d)=%v want %v", c.trigger, c.errs, got, c.want)
+		}
+	}
+}