docs: clarify artifact lifecycle stages

[ElvinMorales]

Summary

This PR closes the artifact lifecycle documentation gap by making lifecycle stages explicit across the builder.

It adds controlled lifecycle-stage documentation, updates catalog metadata, shows lifecycle stage information in the learning panel, and adds runtime public-safety guidance for runtime artifacts.

Issue addressed

Closes #4

Changes

• Adds docs/artifact-lifecycle.md

• Defines the controlled lifecycle stages:

  • design-time
  • runtime
  • iteration

• Updates src/data/artifactCatalog.js so all artifacts use the controlled lifecycle vocabulary

• Remaps prior build-time artifacts to design-time

• Remaps eval-rubric to iteration

• Adds runtime public-safety guidance to runtime artifacts

• Updates the learning panel to show:

  • formatted lifecycle stage
  • short lifecycle explanation
  • runtime warning where applicable

• Updates related docs:

  • README
  • taxonomy alignment
  • rendering strategy
  • catalog renderer coverage
  • public-safety checklist
  • synthetic example README

• Updates tests to enforce lifecycle metadata and runtime safety guidance

Boundary decisions

• Design-time artifacts define agent structure, policies, prompts, schemas, and reusable templates.
• Runtime artifacts describe execution posture or configuration, but public repos should not include unsanitized live runtime data.
• Iteration artifacts capture versioning, feedback, evaluation results, release notes, and improvement loops.
• Memory and state remain separate.
• State is not durable memory.
• Protocol surfaces remain mappings/adapters, not taxonomy replacements.

Validation

• git status --short --branch

• git diff --check

• node --check src/app.js

• node --check src/renderers/markdownRenderer.js

• node --check src/renderers/artifactRenderers.js

• node --check src/renderers/rendererUtils.js

• node --check src/examples/exampleValues.js

• node --check src/data/artifactCatalog.js

• node tests/catalogIntegrity.test.mjs

• node tests/rendererSmoke.test.mjs

• Static server returned HTTP 200 for:

  • /
  • app.js
  • data/artifactCatalog.js

Known limitations

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