feat: add ExDoc and Hex package metadata for Phase 5 (#45)

[andreasronge]

Summary

This PR implements Phase 5 (Polish) by preparing PtcRunner for publication to Hex.pm:

• Added ex_doc ~> 0.31 as a development dependency
• Configured package metadata in mix.exs including:
  • Package name, source URL, and documentation configuration
  • License (MIT) and repository links
  • Homepage URL for Hex package listing
• ExDoc is configured to generate documentation with README.md and architecture.md as extras
• All public modules already have comprehensive @moduledoc documentation

Verification

• mix precommit passes all checks (formatting, compilation, credo, tests)
• Dependencies fetched successfully with mix deps.get
• Project compiles without warnings

Issue Resolution

Fixes #45

Related Issue Details

This implementation follows the specification from issue review which identified and clarified:

• ExDoc configuration patterns for Hex packages
• Inclusion of homepage_url as standard Hex package metadata
• All acceptance criteria have been addressed

[github-actions]

PR Review: feat: add ExDoc and Hex package metadata for Phase 5 (#45)

Summary

This PR adds ExDoc as a dev dependency and configures Hex package metadata to prepare PtcRunner for publication. The implementation is clean and follows standard Elixir/Hex conventions.

What's Good

• Complete package metadata: All required fields for Hex.pm publication are present (name, description, source_url, licenses, links, homepage_url)
• Sensible ExDoc configuration: Setting main: "PtcRunner" and including README.md and architecture.md as extras is appropriate
• Correct dependency placement: ex_doc is properly scoped to only: :dev, runtime: false
• Version choice: ~> 0.31 is a reasonable version constraint for ex_doc
• All modules documented: Verified that all 7 public modules have proper @moduledoc documentation
• Tests pass: 245 tests (3 doctests + 242 unit tests) pass successfully
• Code compiles without warnings

Issues (Must Fix)

None. The implementation is complete and correct.

Suggestions (Optional)

1. Missing LICENSE file - Nice-to-have

   • Observation: The package declares licenses: ["MIT"] but there is no LICENSE file in the repository root
   • Impact: Hex.pm will accept this, but it's best practice to have the actual LICENSE file
   • Recommendation: Out of scope for this PR (issue review correctly identified this). Create a separate issue/PR to add a LICENSE file

2. Consider adding CHANGELOG.md as an extra - Nice-to-have

   • Suggestion: When a CHANGELOG.md is created, consider adding it to the :extras list in docs()
   • Benefit: Provides version history in generated documentation
   • Complexity: Trivial once CHANGELOG exists
   • Recommendation: Defer to future work

Security

No concerns. This PR only adds development tooling configuration.

Verdict

Approve - The PR correctly implements all acceptance criteria from issue #45:

• ✅ ex_doc added as dev dependency
• ✅ Package metadata configured (name, description, licenses, links, homepage_url)
• ✅ Docs configuration set up (main module, extras)
• ✅ Source URL pointing to GitHub repo
• ✅ Tests pass
• ✅ All public modules have @moduledoc documentation

The implementation follows standard Hex package patterns and is ready to merge.

[andreasronge]

Auto-Triage Summary

Review Analysis

The review APPROVED this PR with 0 must-fix issues and 2 optional suggestions.

Decisions Made

#	Issue	Decision	Action	Reasoning
1	Missing LICENSE file	DEFER_ISSUE	Created issue #47	Valid enhancement but out of scope for this PR (ExDoc/Hex metadata only). Simple to add later.
2	Consider adding CHANGELOG.md to extras	IGNORE	None	Explicitly deferred to future work by reviewer. CHANGELOG doesn't exist yet - will be handled when created.

Status

• FIX_NOW items: 0 (PR approved with no blocking issues)
• Issues created: 1 ([From PR #46] Add MIT LICENSE file to repository #47)
• Items ignored: 1 (future work)

Next Steps

Since there are no FIX_NOW items, adding ready-to-merge label. Auto-merge will handle merging once all checks pass.