Update project for latest pmat v2.200.0 features

[noahgift]

Overview

Update aprender to use the latest pmat v2.200.0 features for improved quality gates and tooling.

Current Status

Rust Project Score: 124.0/134 (92.5%, Grade: A+)

New Features to Integrate

1. Quality Gates Configuration (pmat quality-gates)

   • Initialize .pmat-gates.toml with project standards
   • Integrate with CI/CD pipeline
   • Document usage in CLAUDE.md

2. Semantic Code Search (pmat semantic)

   • Enable semantic code search with embeddings
   • Document usage for finding similar code patterns

3. Mutation Testing (pmat mutate)

   • Integrate mutation testing into quality gates
   • Target: ≥80% mutation score

4. Enhanced Scoring (pmat rust-project-score)

   • Add to CI/CD pipeline
   • Track score trends over time

Critical Issues Identified

• 326 unwrap() calls in production code (Cloudflare-class defect)
  • Replace with .expect() or proper error handling
  • Enforce with clippy disallowed-methods
  • Separate tracking issue needed

Recommendations from pmat

• Add workspace.lints for consistent linting
• Enable high-value lint categories
• Create .clippy.toml with disallowed-methods
• Improve test coverage to ≥85%
• Add benchmark CI workflow

Acceptance Criteria

• .pmat-gates.toml configured and working
• Makefile updated with new pmat commands
• CLAUDE.md updated with latest features
• CI/CD using new pmat features
• Documentation complete
• All 742 tests pass

[noahgift]

✅ All acceptance criteria completed:

• ✅ .pmat-gates.toml configured and working
• ✅ Makefile updated with new pmat commands
• ✅ CLAUDE.md updated with latest features
• ✅ CI/CD using new pmat features (tier4 updated)
• ✅ Documentation complete
• ✅ All 742 tests pass

Commits: 19ca344, de1e49a