Enhance KSUID Testing Suite

[vidhvath28]

Overview

This PR introduces a series of enhancements to the KSUID testing suite. It adds multiple new test cases to ensure the robustness and reliability of the KSUID implementation. The tests cover various edge cases and scenarios, helping to improve code quality and maintainability.

Changes Made

Added New Test Cases:

1. testFromInvalidPayload(): Validates behavior when an empty payload is provided.
2. testFromFutureTimestamp(): Ensures that generating a KSUID from a future timestamp functions correctly.
3. testGetValueConsistency(): Checks for consistent retrieval of the KSUID value.
4. testGetPayloadHexConversion(): Confirms that the payload matches its hex conversion.
5. testGetUnixTime(): Verifies that the Unix time corresponds with the provided timestamp.
6. testInspectFromInvalidLength(): Tests how the system responds to KSUIDs of invalid lengths.
7. testFromTimestampValidPayload(): Ensures that a KSUID created from a valid timestamp has a non-empty payload.

[gustavofreze]

The only tests not currently accounted for are:

testFromFutureTimestamp: This ensures that generating a KSUID from a future timestamp functions correctly.
testFromTimestampValidPayload: This ensures that a KSUID created from a valid timestamp has a non-empty payload.
All other suggested tests are already covered in the current suite.

Therefore, the PR should be updated to include only these two new tests, following the pattern of the existing ones, and without altering the file's formatting.