ci: drop cmd/tableauc release tag scheme and bump buf-action

[Kybxd]

Background

Historically each release required pushing two tags pointing at the same commit:

• vX.Y.Z — the root module tag.
• cmd/tableauc/vX.Y.Z — required when cmd/tableauc/ had its own go.mod.

The submodule go.mod was removed back in #181 (since v0.12.1), so cmd/tableauc is now just a regular sub-package of the root module github.com/tableauio/tableau. Users install it via go install github.com/tableauio/tableau/cmd/tableauc@vX.Y.Z, which resolves against the root tag — the cmd/tableauc/vX.Y.Z tag has had no effect on Go tooling since.

The only remaining consumer of cmd/tableauc/* was release.yml, where it was used as the workflow trigger and as part of the asset filename.

Why this matters

Keeping the obsolete tag was actively harmful. When releasing v0.16.1, both tags were pushed to the same commit. Even though buf-ci.yml had filters specifically excluding cmd/tableauc/* from push.tags, the workflow still ran (triggered by the root vX.Y.Z tag), and buf push --git-metadata collects all refs pointing at HEAD. As a result cmd/tableauc/v0.16.1 ended up published as a BSR label on buf.build/tableauio/tableau, polluting the module's label list.

Changes

release.yml

• Trigger on top-level vX.Y.Z release tags instead of cmd/tableauc/*.
• Drop the leading cd cmd/tableauc from the Download dependencies step (no submodule go.mod to download against).
• Asset filename now derives from the root tag, e.g. tableauc.v0.16.1.linux.amd64.tar.gz (consistent with the historical naming style).
• Replace the deprecated ::set-output syntax with $GITHUB_OUTPUT.

buf-ci.yml

• Remove the push.tags allowlist that existed solely to keep cmd/tableauc/* out of buf-action runs — no longer needed.
• Add step names; unquote version: 1.69.0 for consistency.

lint.yml

• Bump bufbuild/buf-action to 1.69.0 to match buf-ci.yml.

Release process going forward

Only the root tag is needed:

git tag v0.16.2
git push origin master v0.16.2
# Then publish a Release on GitHub against v0.16.2.

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf CI / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Jun 23, 2026, 12:18 PM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.94%. Comparing base (17a0e8e) to head (c2f04e0).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #421   +/-   ##
=======================================
  Coverage   74.94%   74.94%           
=======================================
  Files          88       88           
  Lines        9388     9388           
=======================================
  Hits         7036     7036           
  Misses       1781     1781           
  Partials      571      571           

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[wenchy]

DO NOT change the PACKAGE_NAME, keep it compatible and the cmd/tableauc path is good, mabye more cmds are developed in the future.

Revert it to: GITHUB_REF#refs/tags/cmd/tableauc/

Refer to https://github.com/tableauio/tableau/releases/tag/cmd%2Ftableauc%2Fv0.16.1

[Kybxd]

Unable to do this. cmd%2Ftableauc%2FvX.Y.Z is tag name not package name, but we just want to deprecate cmd/tableauc/vX.Y.Z tags in this pr.