<!-- Describe your changes in detail -->
1)Wasm changes 
2) Fix the api contract by introducing the sandbox field
To implement this **search_filter** feature, you'll need to modify these architectural layers:


**1. External Connector Integration**
   - `crates/connector_configs/toml/development.toml`
   - `crates/connector_configs/toml/production.toml`
   - `crates/connector_configs/toml/sandbox.toml`
   - ... and 2 more files

**Code Patterns Applied:**
- Extend existing types with new fields (5 changes)
{"pr_number": 9628, "pr_title": "fix(connector): [Gigadat] Fix the Wasm/api-contract", "merged_at": "2025-09-30T16:24:41Z", "intent": {"feature_type": "search_filter", "action": "add_feature", "entities": ["customer", "payment", "merchant"]}, "hierarchy": {"connectors": ["crates/connector_configs/toml/development.toml", "crates/connector_configs/toml/production.toml", "crates/connector_configs/toml/sandbox.toml", "crates/hyperswitch_connectors/src/connectors/gigadat.rs", "crates/hyperswitch_connectors/src/connectors/gigadat/transformers.rs"]}, "change_types": {"fields_added": 5}, "has_identifier_data": false, "commits_matched": 0, "match_method": "none"}