Fix submit_pull_request_review when not in pull_request trigger (fixes #16587)

[strawgate]

Adds target to submit-pull-request-review (same semantics as add-comment). When the workflow isn't triggered by a PR (e.g. workflow_dispatch), set target to the PR number so the handler can resolve and set review context before finalization.

Fixes #16587

[Copilot]

Pull request overview

This PR fixes issue #16587 where submit_pull_request_review would lose review context during finalization when workflows are not triggered by a pull request event (e.g., workflow_dispatch). The fix adds a target field to the submit-pull-request-review safe output configuration, following the same semantics as add-comment.

Changes:

• Added target configuration field to submit-pull-request-review handler with support for "triggering" (default), "*" (use pull_request_number from message), or explicit PR number
• Implemented target resolution logic using the shared resolveTarget helper function to fetch PR context when needed
• Updated validation, documentation, and added comprehensive test coverage for the new functionality

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/workflow/submit_pr_review.go	Adds Target field to SubmitPullRequestReviewConfig struct with YAML parsing
pkg/workflow/safe_outputs_target_validation.go	Includes submit-pull-request-review in target validation
pkg/workflow/compiler_safe_outputs_config.go	Adds target to handler config JSON via AddIfNotEmpty
pkg/workflow/submit_pr_review_footer_test.go	Adds tests for target field parsing and handler config inclusion
actions/setup/js/submit_pr_review.cjs	Implements target resolution using resolveTarget helper, fetches PR when needed
actions/setup/js/submit_pr_review.test.cjs	Adds tests for target scenarios (explicit number, "*", triggering, non-PR context)
docs/src/content/docs/reference/safe-outputs.md	Documents the new target field with usage examples

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[pelikhan]

Update the spec as well.

[strawgate]

done