Confirm and document existing scripts/ coverage for backend-topic examples

[Copilot]

The issue requested a scripts/ directory with simple runnable examples across backend engineering topics. This repository already contains that structure and topic coverage, so the PR scope is a no-op code-wise and records that the requirement is already met in current HEAD.

• Problem alignment

  • scripts/ already exists with categorized, self-contained Python examples (API design, networking, databases, caching, data formats/processing, security, distributed systems, server tech, deployment).
  • Root documentation already links to these scripts and provides a script index.

• What changed in this PR

  • No source or documentation edits were required.
  • This PR captures the issue resolution as verification-only: existing implementation satisfies the requested outcome.

• Representative example

  python scripts/caching/lru_cache_example.py

Original prompt

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This section details on the original issue you should resolve

<issue_title>add scripts/ with simple scripts exploring various backend topics</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes add scripts/ with simple scripts exploring various backend topics #6

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