Lab 3 — CI/CD: A PR-Gated Pipeline for QuickNotes

[Nik-ari-ai]

Goal

Wire vet + test + lint as a required PR gate for QuickNotes, cache the Go module download, and investigate pipeline wall-clock time.

Changes

• .github/workflows/ci.yml — vet/test matrix (1.23/1.24), lint (golangci-lint v2.5.0), ci-ok gate; SHA-pinned actions; permissions: contents: read; cache + path filter
• submissions/lab3.md — Task 1-2 evidence and design answers

Testing

• Green run: 6 checks pass; deliberate test break blocked the PR (BLOCKED), fix restored green (CLEAN)
• Branch protection requires ci-ok; docs-only PR skipped via path filter

Checklist

• Title is a clear sentence (≤ 70 chars)
• Commits are signed (git log --show-signature)
• submissions/lab3.md updated