Please address the comments from this code review:

## Overall Comments
- In `evaluateBinaryExpression`, logical operators (`&&`, `||`) always evaluate both sides because `evaluateASTExpression` is called on `X` and `Y` before checking the operator; if OCR calls are embedded in expressions, consider adding explicit short-circuit evaluation to avoid unnecessary recognitions and potential side effects.
- In `resolveExpressionValues`, `expressionNodePattern.ReplaceAllStringFunc` calls `FindStringSubmatch` for each match even though the full match is already provided; you can simplify and avoid the extra regex work by capturing the placeholder content directly from the `match` string (e.g., by trimming the surrounding braces).

## Individual Comments

### Comment 1
<location path="agent/go-service/creditshopping/reserve_recognition.go" line_range="109-118" />
<code_context>
+		return reserveRecognitionConfig{}, err
+	}
+
+	if expressionRaw, ok := params["expression"]; ok {
+		expression, ok := expressionRaw.(string)
+		if !ok {
+			return reserveRecognitionConfig{}, fmt.Errorf("expression: unsupported type %T", expressionRaw)
+		}
+		expression = strings.TrimSpace(expression)
+		if expression == "" {
+			return reserveRecognitionConfig{}, fmt.Errorf("expression: must not be empty")
+		}
+		return reserveRecognitionConfig{
+			Expression: expression,
+		}, nil
</code_context>
<issue_to_address>
**suggestion:** Threshold is silently ignored when an expression is provided

When `expression` is present, the function returns a config with only `Expression`, silently discarding any `threshold` value. To avoid confusing mixed configs, either validate and reject cases where both are provided, or clearly log/document that `threshold` is ignored when `expression` is set.

Suggested implementation:

```golang
	if expressionRaw, ok := params["expression"]; ok {
		if _, hasThreshold := params["threshold"]; hasThreshold {
			return reserveRecognitionConfig{}, fmt.Errorf("expression: must not be provided together with threshold")
		}

		expression, ok := expressionRaw.(string)
		if !ok {
			return reserveRecognitionConfig{}, fmt.Errorf("expression: unsupported type %T", expressionRaw)
		}
		expression = strings.TrimSpace(expression)
		if expression == "" {
			return reserveRecognitionConfig{}, fmt.Errorf("expression: must not be empty")
		}
		return reserveRecognitionConfig{
			Expression: expression,
		}, nil
	}

```

None required based on the provided snippet. This change ensures that when both `expression` and `threshold` are present, the function fails fast with a clear validation error instead of silently ignoring `threshold`.
</issue_to_address>