🎨 Palette: Improve CLI feedback and visual hierarchy

[ruhdevops]

💡 What: This PR enhances the CLI experience of the tutorial scripts by adding execution timing to the final results, ensuring unique mock data generation, and improving the visual hierarchy of the terminal output.

🎯 Why:

• Execution timing provides users with tangible feedback on the workflow's performance.
• Using random.sample avoids duplicate IDs in the output, which can be confusing for a "processing" demo.
• Descriptive Rule titles ('Next Step', 'Conclusion') create a clearer structure for the onboarding flow.

♿ Accessibility: The improved visual hierarchy with Rule titles makes the terminal output easier to scan for all users.

Verification:

• Ran black, ruff, and mypy (all passed).
• Manually executed both 01_getting_started.py and 02_logging.py to verify the new visual touches.

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PR created automatically by Jules for task 16726185796229475166 started by @ruh-al-tarikh

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