Get current API key usage statistics

{
    "success": true,
    "data": {
        "total_requests": 15234,
        "last_used_at": "2025-01-15T10:30:00Z",
        "last_24h_requests": 523,
        "avg_response_time_ms": 145,
        "endpoints": {
            "/api-v1/transactions": 8500,
            "/api-v1/reports/cash-flow": 3200,
            "/api-v1/reports/summary": 2100,
            "/api-v1/bank-accounts": 1434
        },
        "status_codes": {
            "200": 14800,
            "400": 234,
            "404": 188,
            "500": 12
        },
        "recent_requests": [
            {
                "endpoint": "/api-v1/transactions",
                "method": "GET",
                "status_code": 200,
                "response_time_ms": 180,
                "created_at": "2025-01-15T10:30:00Z"
            },
            {
                "endpoint": "/api-v1/reports/summary",
                "method": "GET",
                "status_code": 200,
                "response_time_ms": 320,
                "created_at": "2025-01-15T10:29:45Z"
            }
        ]
    }
}