fix(webhooks): add support for updating mandate details in webhooks flow

[srujanchikke]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

hot fix PR for #6523

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

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Changed Files

File	Status
crates/hyperswitch_connectors/src/connectors/fiuu/transformers.rs	25% smaller
crates/router/src/core/webhooks/incoming.rs	5% smaller
crates/diesel_models/src/payment_attempt.rs	2% smaller
crates/hyperswitch_connectors/src/connectors/fiuu.rs	1% smaller
crates/hyperswitch_domain_models/src/payments/payment_attempt.rs	0% smaller
crates/hyperswitch_domain_models/src/router_flow_types/webhooks.rs	0% smaller
crates/hyperswitch_interfaces/src/webhooks.rs	0% smaller
crates/router/src/configs/defaults/payment_connector_required_fields.rs	0% smaller
crates/router/src/services/connector_integration_interface.rs	Unsupported file format