chore: establish local platform baseline

internal/observability/dependencies_test.go

@@ -0,0 +1,15 @@
+package observability
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+func TestInstrumentDependencyCheckPreservesResult(t *testing.T) {
+	expected := errors.New("unavailable")
+	check := InstrumentDependencyCheck("test", "dependency", func(context.Context) error { return expected })
+	if err := check(context.Background()); !errors.Is(err, expected) {
+		t.Fatalf("error = %v", err)
+	}
+}