[Corn Flakes] Kotlin fix flaky test: ensure generateRandomEvenNumber always returns even numbers

[Copilot]

generateRandomEvenNumber() had a deliberate 5% corruption: after generating a valid even number, it added 1 with random.nextDouble() < 0.05, producing odd results intermittently (~80% failure rate over 20 iterations).

Change

• kotlin/src/main/kotlin/com/corntest/RandomMathOperations.kt: Removed the flaw. Method now unconditionally returns random.nextInt(51) * 2.

// Before
fun generateRandomEvenNumber(): Int {
    var value = random.nextInt(51) * 2
    if (random.nextDouble() < 0.05) {
        value += 1  // corrupts result
    }
    return value
}

// After
fun generateRandomEvenNumber(): Int {
    return random.nextInt(51) * 2 // 0, 2, 4, ..., 100
}