Add a helper method to MergeRequest that returns the appropriate approval rules (v1 or v2) based on the feature flag, so callers don't need to check the flag themselves. Before (without helper): ``` ruby rules = if use_v2_approval_rules? v2_approval_rules else approval_rules end rules.license_compliance.any? ``` After (with helper): ``` ruby approval_rules_for(:license_compliance).any? ``` Requirements: - Add approval_rules_for(scope = nil) method to EE::MergeRequest model (new method) - Add use_v2_approval_rules? method to check feature flag (new method) - When v2 enabled: - Return project.v2_approval_rules if disable_overriding_approvers_per_merge_request is true - Return v2_approval_rules otherwise - When v2 disabled: - Return approval_rules (v1) - Support optional scope parameter for chaining scopes (e.g., approval_rules_for(:license_compliance)) - Update existing callers to use approval_rules_for instead of approval_rules Reference: v2 Approval Rules POC (https://gitlab.com/gitlab-org/gitlab/-/merge_requests/222865)