docs+quickstart: Medium cross-link and a header in the greeter example

[oleksandr-kazimirov]

Cross-link pass after the KZM-3.4 announcements: canonical article byline gains the Medium link; the quickstart greeter sets one record header on its egress so the feature is visible in the first example users run. Quickstart smoke validates the round-trip against the published 3.4.0-KZM-3.4 artifacts.

Summary by CodeRabbit

• New Features

  • Quickstart greeting messages now include a greeted-by Kafka header identifying the component that produced them.

• Documentation

  • Updated the Kafka record headers article with publication attribution and links to read the article on dev.to and Medium.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: a3da217e-b9b3-44bb-a7de-5240afbfbda7

📥 Commits

Reviewing files that changed from the base of the PR and between 2cda350 and f07b0f3.

📒 Files selected for processing (2)

• docs/articles/kafka-record-headers.md
• examples/quickstart/greeter/src/main/java/io/github/kzmlabs/quickstart/GreeterFn.java

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Walkthrough

The greeter example now emits a greeted-by Kafka header. The Kafka record headers article’s publication metadata now includes maintainer attribution and links to dev.to and Medium.

Changes

Greeter Kafka header

Layer / File(s)	Summary
Emit greeter header examples/quickstart/greeter/src/main/java/io/github/kzmlabs/quickstart/GreeterFn.java	The egress message builder adds the UTF-8 greeted-by header with value quickstart-greeter.

Article publication metadata

Layer / File(s)	Summary
Update publication metadata docs/articles/kafka-record-headers.md	The publication line adds kzmlabs maintainers attribution and dev.to and Medium links.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• kzmlabs/flink-statefun#268: Revises the same Kafka record headers article, including its title, description, and header guidance.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the two main changes: a Medium cross-link in docs and a Kafka record header in the greeter example.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/cross-links-quickstart-header

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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