docs(runbook): add sprint 7 operational walkthrough section

[AAdewunmi]

Summary

Adds a Sprint 7 walkthrough section to the runbook to make operational verification easier during a practical project walkthrough.

Changes

• added a new Sprint 7 walkthrough intent section near the top of RUNBOOK.md
• included the provided Sprint 7 framing text describing the runbook’s purpose and audience
• added a compact set of make commands for common operational tasks
• added equivalent Docker Compose commands for running, inspecting, and verifying the app

Behavior

The runbook now introduces its practical Sprint 7 purpose earlier and gives readers a faster path to the commands they are most likely to need during a demo, review, or operational walkthrough.

Why

This makes the runbook more useful for operators, reviewers, and hiring managers by surfacing the most relevant commands and expectations without requiring them to scan the full document first.

Validation

The added commands were aligned with the repository’s current operational workflow and Makefile targets, including:

• make up
• make ps
• make logs
• make shell
• make migrate
• make test
• make test-cov
• make lint
• make format-check
• make check

Result

The runbook now starts with clearer operational context and a concise command reference for Sprint 7 walkthroughs.

Notes

• this change updates documentation only
• no application code, CI behavior, or runtime configuration was changed

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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