…epo (#1554)

Co-authored-by: Clément Chanchevrier <[email protected]>

The matrix strategy previously caused the analyze action to implicitly
set category '/language:typescript'. Removing the matrix dropped that
implicit category, breaking PR-vs-master comparison in GitHub code
scanning. Make it explicit instead.

* Fix: Move changelog empty check after categorization for accuracy

* chore: add tests and update build

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Co-authored-by: Clément Chanchevrier <[email protected]>

* ci: make sure PRs have a type label

* ci: fetch labels at runtime

* fix: support pull_request_target event in autolabeler

Fixes #1559

## What

Added pull_request_target as an accepted event type in the autolabeler
event validation check.

## Why

The autolabeler only accepted pull_request events, but pull_request_target
is required for workflows that need write permissions to label PRs from
forks. The payload shape is identical between both events, so no other
code changes are needed.

## Notes

- The v6 release-drafter action supported pull_request_target when used with disable-releaser: true; this restores that capability for the v7 autolabeler sub-action

Signed-off-by: jmeridth <[email protected]>

* fix: run npm run all after PR feedback

Signed-off-by: jmeridth <[email protected]>

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Signed-off-by: jmeridth <[email protected]>

* fix: update README with pull_request_target example

Now that #1560 has merged
it is helpful to have this example in the README

Signed-off-by: jmeridth <[email protected]>

* fix: move to auto-labeller section

Signed-off-by: jmeridth <[email protected]>

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Signed-off-by: jmeridth <[email protected]>