[GH] (texera/main): Workflow run "npm_and_yarn in /frontend for axios - Update #1350982771" failed!

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The GitHub Actions job "npm_and_yarn in /frontend for axios - Update #1350982771" on texera.git/main has failed.
Run started by GitHub user dependabot[bot] (triggered by dependabot[bot]).

Head commit for run:
3bb05ab3fa78042289d874b933d4fb87acaaa63d / Yicong Huang <17...@users.noreply.github.com>
chore(ci): show Codecov carryforward flags in PR comments (#4973)

### What changes were proposed in this PR?

The labeler routes each PR to a subset of CI stacks, so most PRs upload
coverage for only one or two flags and the rest are carried forward from
main (already configured via
`flag_management.default_rules.carryforward: true`). Codecov's default
still **hides** those carry-forward rows from the PR comment, which
makes the table look empty on a frontend-only or python-only PR. Add
`comment.show_carryforward_flags: true` so the table shows every flag —
fresh-data rows track the patch and carryforward'd rows render with
`<ø>` to flag their unchanged status.

### Any related issues, documentation, discussions?

Closes #4972.

### How was this PR tested?

`curl https://codecov.io/validate` against the file returns "Valid!"
with the new key parsed.

### Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Opus 4.7 (Claude Code)

Report URL: https://github.com/apache/texera/actions/runs/25426626276

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