<!-- Describe your changes in detail -->

this pr introduces 0 dollar mandate (setup mandate) for payload connector.
To implement this **search_filter** feature, you'll need to modify these architectural layers:


**1. External Connector Integration**
   - `crates/hyperswitch_connectors/src/connectors/payload.rs`
   - `crates/hyperswitch_connectors/src/connectors/payload/transformers.rs`

**2. Tests**
   - `cypress-tests/cypress/e2e/configs/Payment/Payload.js`

**Code Patterns Applied:**
- Define new data structures (1 changes)
- Implement new functions (9 changes)
- Extend existing types with new fields (59 changes)
- Add conditional logic for feature flags or filtering (1 changes)

**Detailed Identifier Changes:**


Commit 4e33e974:
Files to modify:


**crates/hyperswitch_connectors/src/connectors/payload.rs**
  Modify existing code

**crates/hyperswitch_connectors/src/connectors/payload/transformers.rs**
  Modify existing code
{"pr_number": 9110, "pr_title": "feat(connector): introduce setup mandate flow for payload", "merged_at": "2025-09-01T11:39:16Z", "intent": {"feature_type": "search_filter", "action": "add_feature", "entities": ["customer", "payment", "merchant"]}, "hierarchy": {"connectors": ["crates/hyperswitch_connectors/src/connectors/payload.rs", "crates/hyperswitch_connectors/src/connectors/payload/transformers.rs"], "tests": ["cypress-tests/cypress/e2e/configs/Payment/Payload.js"]}, "change_types": {"structs_added": 1, "functions_added": 9, "fields_added": 59, "conditionals_added": 1}, "has_identifier_data": true, "commits_matched": 1, "match_method": "pr_number"}