feat: add load testing scripts and configuration for various scenarios

[DanielPopoola]

Summary by CodeRabbit

• New Features

  • Added load test scenarios: baseline queue test, sustained traffic test, spike test, breakpoint test, contention test, and polling bottleneck test.
  • Added token generation utility for load testing.
  • Added shared configuration and setup helper modules for load tests.

• Removed

  • Removed legacy load test scenarios: thundering herd, sustained load, and correctness check tests.

• Chores

  • Updated .gitignore to normalize file entries and exclude token data.

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Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

This pull request refactors the loadtest suite by removing three existing k6 load-test scripts and replacing them with six new test scenarios. It introduces three shared library modules for configuration, setup, and token management, plus a token generation utility. The changes consolidate common functionality into reusable modules.

Changes

Cohort / File(s)	Summary
Configuration and Ignores .gitignore	Normalized build-errors.log entry and added ignore rule for loadtest/scripts/tokens.json.
Removed Loadtest Scripts loadtest/scripts/01_thundering_herd.js, loadtest/scripts/02_sustained_load.js, loadtest/scripts/03_correctness_check.js	Deleted three existing k6 load-test scripts (260 lines removed). 01_thundering_herd.js performed stage-based VU ramping with OTP flow; 02_sustained_load.js executed full customer flow with ticket claiming; 03_correctness_check.js validated event stats post-test.
New Baseline and Sustained Tests loadtest/scripts/01_baseline.js, loadtest/scripts/02_sustained.js	Added simplified queue-join tests replacing deleted scripts. 01_baseline.js uses fixed load (50 VUs, 2m duration) with threshold checks. 02_sustained.js ramps load to 500 VUs over 5 minutes, sustains for 30 minutes, then ramps down with per-VU sleep between requests.
New Spike, Breakpoint, and Contention Tests loadtest/scripts/03_spike.js, loadtest/scripts/04_breakpoint.js, loadtest/scripts/05_contention.js	Added specialized load-test scenarios. 03_spike.js uses constant-arrival-rate (20k iter/s, 30s) with 10k–60k VU allocation. 04_breakpoint.js ramps VUs to 40k across five 2-minute stages. 05_contention.js uses 20k fixed VUs with polling loop to wait for queue admission and claim ticket.
New Polling and Token Generation Tests loadtest/scripts/06_polling.js, loadtest/scripts/generate_tokens.js	Added polling-focused test (5k VUs, 5m duration) and standalone token generation script. 06_polling.js repeatedly GETs queue position. generate_tokens.js bulk-generates and persists auth tokens to tokens.json via OTP flow.
Shared Loadtest Libraries loadtest/scripts/lib/config.js, loadtest/scripts/lib/setup.js, loadtest/scripts/lib/tokens.js	Added three reusable modules. config.js exports BASE_URL, DEFAULT_HEADERS(), and requireEnv(). setup.js exports setupEvent() for organizer login, event creation, and activation. tokens.js exports token dataset (via SharedArray) and getToken(vu) selector function.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

• feat: load testing infrastructure and CI/CD pipeline #11 — The loadtest infrastructure and lib modules introduced in this PR directly correspond to and extend the initial loadtest setup work.
• feat: update load test scripts to use correct threshold syntax and im… #14 — Prior PR modified threshold syntax in 01_thundering_herd.js and 02_sustained_load.js, both of which are deleted and replaced here.
• feat: add load test image build and push steps to CI/CD workflow #12 — Prior PR added the original loadtest scripts that are now being refactored and consolidated into this new modular structure.

Poem

🐰 Hop, hop—the tests now leap and bound,
With spikes and polling all around!
Old scripts retire, new ones spring,
Shared lib-rar-ies make burrows sing, 🌾
The fairqueue hops more load each day!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely summarizes the main change—adding multiple k6 load testing scripts and supporting configuration modules for different test scenarios.

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✨ 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 go-version

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