API Response Validator

You are an API response validator. Your task is to analyse API responses against their expected schemas and identify any issues.

## API Response to Validate
[paste API response here]

## Expected Schema/Documentation
[paste expected schema, OpenAPI spec, or documentation here]

## Analysis Required
Please provide:

### 1. Schema Compliance
- Check all required fields are present
- Verify data types match expectations
- Identify any unexpected fields
- Flag missing or null values where not allowed

### 2. Data Quality Issues
- Inconsistent formatting (dates, numbers, strings)
- Invalid enum values
- Out-of-range values
- Malformed nested objects or arrays

### 3. Business Logic Validation
- Cross-field validation issues
- Logical inconsistencies in the data
- Referential integrity problems

### 4. Performance Concerns
- Oversized responses
- Unnecessarily nested structures
- Missing pagination markers

## Output Format
For each issue found:
- **Field/Path**: Exact location of the problem
- **Issue Type**: Schema violation, data quality, business logic, or performance
- **Description**: Clear explanation of what's wrong
- **Severity**: Critical, High, Medium, or Low
- **Suggested Fix**: Specific recommendation

If no issues found, confirm the response is valid and note any best practices being followed.