Pin CI to meta-ci-action v2 and move npdlint scope to pyproject

[lispandfound]

What changed

• .github/workflows/ci.yml: pin the shared CI call to meta-ci-action@v2
  instead of @main, and add a push trigger on master alongside
  pull_request, so the default branch itself gets checked, not just PRs.
• .github/workflows/claude-review.yml: pin the claude-review.yml call to
  @v2 as well, for the same reason.
• pyproject.toml: added [tool.npdlint] with include = ["IM"], and
  dropped the now-redundant package-dir: IM input from ci.yml. npdlint
  reads its scope from [tool.npdlint] directly, so this keeps the
  docstring-lint job scoped to the IM package as before, but makes the
  local lefthook pre-push hook (which has no package-dir to pass) scope
  itself the same way. Previously the local hook had no config to read and
  fell back to linting the whole tree, including tests/ and examples/,
  which is why .ai/ci-checks failed on ~70 docstring issues there even
  though the actual GitHub numpydoc-lint job (which does get package-dir)
  was passing on IM alone.

No workflow files needed deleting: this repo had already consolidated ruff,
deptry, numpydoc and type-check into the single ci.yml caller, so there
were no per-tool duplicate workflows left to replace. lefthook.yml was
already switched to the shared v2 hooks in an earlier commit on this
branch.

publish-PyPI.yml and wiki.yml are repo-specific (PyPI release builds and
wiki deployment) with no meta-ci-action equivalent, so they're untouched.

Checks fixed

• npdlint (the only local check failing before this change) now passes:
  scoping it to IM via [tool.npdlint] include removes the spurious
  tests//examples/ docstring findings, matching what the real CI job
  already enforced.

.ai/ci-checks is fully green: ruff, ruff-format, rustfmt, clippy, deptry,
npdlint, ty, cargo-test, pytest all pass.

What might still go red

• The GitHub-reported failures on Dependabot Updates, Publish to PyPI,
  and Type Check (the old workflow name) are unrelated to the
  meta-ci-action baseline and weren't touched — Type Check in particular
  looks like it was already fixed by the earlier ty/lefthook work on this
  branch, since ty passes locally now, but the badge may still show the
  older failing run until the new ci.yml runs on master.
• @v2 is used for both meta-ci-action calls as instructed; this assumes a
  v2 tag exists in ucgmsim/meta-ci-action at merge time.

Applied by the script

• Switch lefthook.yml to meta-ci-action's shared hooks at v2 Dropped local copies of shared commands: pre-commit/ruff, pre-commit/ruff-format, pre-commit/rustfmt, pre-push/ruff, pre-push/ruff-format, pre-push/ty, pre-push/numpydoc, pre-push/clippy, pre-push/rustfmt.

Cost $0.59, 30 turns.

🤖 Generated with Claude Code