<!-- Describe your changes in detail -->
Enables filtering of default connectors for contract based routing
To implement this **search_filter** feature, you'll need to modify these architectural layers:


**1. API Request/Response Models**
   - `crates/api_models/src/routing.rs`

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

**Code Patterns Applied:**
- Extend existing types with new fields (2 changes)
- Add conditional logic for feature flags or filtering (1 changes)
- Modify database queries (3 changes)

**Detailed Identifier Changes:**


Commit c0c08d05:
Files to modify:


**crates/api_models/src/routing.rs**
  Modify existing code

**crates/router/src/core/payments/routing.rs**
  Modify existing code

**crates/router/src/core/routing.rs**
  Modify existing code

**crates/router/src/core/routing/helpers.rs**
  Modify existing code
{"pr_number": 7420, "pr_title": "fix(routing): Enable filtering of default connectors for contract based routing", "merged_at": "2025-03-12T10:21:35Z", "intent": {"feature_type": "search_filter", "action": "add_feature", "entities": ["connector"]}, "hierarchy": {"api_models": ["crates/api_models/src/routing.rs"], "core_business": ["crates/router/src/core/payments/routing.rs", "crates/router/src/core/routing.rs", "crates/router/src/core/routing/helpers.rs"]}, "change_types": {"fields_added": 2, "conditionals_added": 1, "database_queries": 3}, "has_identifier_data": true, "commits_matched": 1, "match_method": "pr_number"}