Test Coverage Before v1.0.0

[soatok]

Given that formal models and requirements traceability are handled in an external repo, the only work needed to lift pkd-server-php to v1.0.0 territory is:

• Mutation Testing
  • Running in CI
  • MSI > 95% (currently 98%)
• Fuzz Testing
  • Running in CI
  • Covers all encoding/decoding and PSR-7 objects
• Psalm
  • Running in CI
  • Error level 1 (currently 3)
• PHPStam
  • Running in CI
  • Strictness level 9 (currently 7)
• Semgrep
  • Running in CI
  • No unresolved detections

[soatok]

There is still much to do here.