* fix: Refactor `comment_intent` to use `_contains_url_with_host` for URL host matching.
* ci: add least-privilege permissions blocks to workflow callers
Resolves code scanning alerts #4 and #5 (actions/missing-workflow-permissions). Both callable workflows only need contents: read; the dependency-review callable already declares it internally, this caps the caller token to match.
* Add dependency-review caller workflow
Add a pull_request-triggered caller that invokes the org-level
callable-dependency-review workflow to scan dependency changes and
fail on high-severity advisories.
* chore: retrigger checks
* chore: retrigger dep review (post-fix)
