Upgrade guides

Checklists and safe-defaults guides for upgrading to new major versions.

• v0.11.6 Upgrade Checklist
  • Who should read this
  • What changed
  • Upgrade actions
  • Quick verification for downstream integrators
  • Related references
• v0.11.4 Upgrade Checklist
  • Breaking changes
• v1.0.0 upgrade checklist
  • 1. Environment variables
  • 2. pyproject.toml configuration
  • 3. API changes from v0.11.x
  • 4. Guarded explanation migration
  • 5. ExplainerBuilder and ExplainerConfig wiring
  • 6. Caching
  • 7. Parallel execution
  • 8. Plugin testing and diagnostics
  • 9. Reject framework