fix(engine): tighten YAML scalar edge cases

Assisted-by: OpenAI GPT-5
Signed-off-by: Puneet Dixit <236133619+puneetdixit200@users.noreply.github.com>

pkg/engine/funcs.go

@@ -160,9 +160,6 @@ func normalizeYAMLMapKey(key any) any {
 	if reflect.TypeOf(normalized).Comparable() {
 		return normalized
 	}
-	if reflect.TypeOf(key).Comparable() {
-		return key
-	}
 	return fmt.Sprint(normalized)
 }
 

pkg/engine/funcs_test.go

@@ -143,6 +143,7 @@ keyInElement1 = "valueInElement1"`,
 }
 
 func TestNormalizeYAMLScalars(t *testing.T) {
+	firstUnsafeInteger := float64(maxSafeYAMLInteger + 1)
 	aboveSafeInteger := math.Nextafter(maxSafeYAMLInteger, math.Inf(1))
 
 	tests := []struct {
@@ -165,6 +166,11 @@ func TestNormalizeYAMLScalars(t *testing.T) {
 			input:  map[string]any{"value": float64(maxSafeYAMLInteger)},
 			expect: map[string]any{"value": int64(maxSafeYAMLInteger)},
 		},
+		{
+			name:   "first unsafe integer float stays float",
+			input:  map[string]any{"value": firstUnsafeInteger},
+			expect: map[string]any{"value": firstUnsafeInteger},
+		},
 		{
 			name:   "unsafe integer floats stay floats",
 			input:  map[string]any{"value": aboveSafeInteger},