Release shiny2docker 0.0.4 (CRAN prep): expose renv_version + coverage 98%

[VincentGuyader]

Summary

• Exposes renv_version parameter on shiny2docker(), forwarded to dockerfiler::dock_from_renv() (NULL -> bootstrap latest renv, skipping remotes).
• Pins dockerfiler (>= 0.2.6), satisfied by dockerfiler 1.0.0 now on CRAN.
• Bumps version to 0.0.4 and prepares CRAN submission (NEWS, cran-comments.md, .Rbuildignore).
• Adds 27 unit tests, raising coverage from 58.82% to 98.04%.

Changes

Feature (already on this branch)

• 192d8dc feat: expose renv_version param, forwarded to dock_from_renv
• e2b0082 feat: pin dockerfiler (>= 0.2.6) and cover explicit renv_version branch

Release prep + coverage (new in this commit)

• 73255ef chore(release): prepare shiny2docker 0.0.4 for CRAN
  • DESCRIPTION: version 0.0.3 -> 0.0.4, attachment sync, mockery added to Suggests, RoxygenNote 7.3.2 -> 7.3.3
  • NEWS.md: freeze # shiny2docker 0.0.4 section, document dockerfiler floor
  • cran-comments.md (new)
  • .Rbuildignore: add cran-comments.md, CRAN-SUBMISSION, doc, Meta
  • dev/config_attachment.yaml: pin renv and mockery in extra.suggests
  • tests/testthat/test-set_github_action.R (new, 9 tests)
  • tests/testthat/test-set_gitlab_ci.R (+6 tests)
  • tests/testthat/test-shiny2docker.R (+2 tests)

Coverage delta

File	Before	After
R/set_github_action.R	0.00%	96.15%
R/set_gitlab_ci.R	68.42%	100.00%
R/shiny2docker.R	89.47%	97.37%
Global	58.82%	98.04%

CRAN readiness

Check	Result
R CMD check --as-cran	0 errors / 0 warnings / 0 notes
devtools::test()	39 PASS / 0 FAIL / 0 SKIP
Coverage	98.04%
pr-reviewer agent	APPROVE
security-review agent	Safe to ship

Security review: 0 Critical/High findings. Two Low items noted for a future patch (input validation on renv_version and GitLab tags; both are self-injection on the developer's own machine, outside the trust model). Pre-existing .dockerignore gap (does not exclude .Renviron/.env/keys) flagged for a 0.0.5 release.

Before merge / CRAN push

• cran-comments.md lists GitHub Actions, R-hub, win-builder as test environments. Either run them for real (recommended: devtools::check_win_devel() + devtools::check_win_release() + rhub::check_for_cran()) and keep the list, or trim to what was actually executed before pressing submit.
• After CRAN acceptance, tag v0.0.4.

Test plan

• devtools::test() -> 39 PASS
• devtools::check(args = "--as-cran") -> 0/0/0
• covr::package_coverage() -> 98.04%
• devtools::check_win_devel() (to run before submit_cran)
• devtools::check_win_release() (to run before submit_cran)
• rhub::check_for_cran() (to run before submit_cran)