<!-- Describe your changes in detail -->
Added iban as a required field for Sepa Bank Debit in Inespay.
To implement this **search_filter** feature, you'll need to modify these architectural layers:


**1. External Connector Integration**
   - `crates/router/src/configs/defaults/payment_connector_required_fields.rs`

**Code Patterns Applied:**
- Extend existing types with new fields (7 changes)
{"pr_number": 7350, "pr_title": "fix(connector): [INESPAY] Added iban as required field in Inespay", "merged_at": "2025-03-17T07:20:01Z", "intent": {"feature_type": "search_filter", "action": "add_feature", "entities": ["payment", "merchant", "user"]}, "hierarchy": {"connectors": ["crates/router/src/configs/defaults/payment_connector_required_fields.rs"]}, "change_types": {"fields_added": 7}, "has_identifier_data": false, "commits_matched": 0, "match_method": "none"}