0. Create new `pm_advisory_graphql` feature flag
## Overview
This Work item covers the creation of the `pm_advisory_graphql` [feature flag](https://docs.gitlab.com/development/feature_flags/) which will be used to govern access to making GraphQL API requests to return Advisory records.
## Actions
- [ ] Create `pm_advisory_graphql.yml` under `config/feature_flags/wip/` with the following content by running `bin/feature-flag --ee pm_advisory_graphql`:
```yaml
---
name: pm_advisory_graphql
description:
feature_issue_url: https://gitlab.com/gitlab-org/gitlab/-/work_items/591071
introduced_by_url: <fill-in-with-MR-url>
rollout_issue_url:
milestone: '18.10'
group: group::composition analysis
type: wip
default_enabled: false
```
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