<!-- Describe your changes in detail -->
The command `just run_v2` errored out due to missing feature flags on Dynamic Routing trait.
This PR fixes that.
To implement this **search_filter** feature, you'll need to modify these architectural layers:


**1. Core Business Logic**
   - `crates/router/src/core/routing/helpers.rs`

**Code Patterns Applied:**
{"pr_number": 7223, "pr_title": "fix(v2): Trait gating in v2", "merged_at": "2025-02-12T08:47:58Z", "intent": {"feature_type": "search_filter", "action": "add_feature", "entities": []}, "hierarchy": {"core_business": ["crates/router/src/core/routing/helpers.rs"]}, "change_types": {"imports_added": 4}, "has_identifier_data": false, "commits_matched": 0, "match_method": "none"}