feat: complete all lab2 tasks

[ph1larmon1a]

Goal

Generate and document a Threagile threat model for OWASP Juice Shop.
Produce the full report, diagrams, risk outputs, and summarize results in labs/submission2.md.

Changes

• Added labs/lab2/threagile-model.yaml (baseline threat model).
• Generated Threagile artifacts: report.pdf, diagrams, risks.json, stats.json, technical-assets.json.
• Added labs/submission2.md with:
  • Top 5 risks table (sorted by weighted score).
  • Delta Run comparison (baseline vs secure).
  • Stats snapshot and explanations.
• Created a secure variant of the model

Testing

• Ran Threagile baseline model and confirmed all outputs were generated in labs/lab2/baseline.
• Re-ran with secure variant (threagile-model.secure.yaml) and verified risk counts decreased.
• Validated JSON parsing and risk ranking with a helper Python script.
• Opened report.pdf to confirm diagrams render correctly.

Artifacts & Screenshots

• labs/lab2/baseline/report.pdf (full report with diagrams).
• labs/lab2/baseline/data-flow.png (data-flow diagram).
• labs/lab2/baseline/risks.json (baseline risk list).
• labs/lab2/secure/report.pdf (full report with secure diagrams).
• labs/lab2/secure/data-flow.png (data-flow secure diagram).
• labs/lab2/secure/risks.json (secure variant).
• labs/submission2.md (final write-up).

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Checklist

• PR has a clear and descriptive title
• Documentation updated if needed
• No secrets or large temporary files committed
• Task 1: Threagile baseline model + report + diagrams + submission2.md (Top 5)
• Task 2: HTTPS Variant + secure run + Category delta table + delta explanation