feat(router): add confirm flag in kafka payment intent events

[sai-harsha-vardhan]

Type of Change

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

Description

add confirm flag in kafka payment intent events
Main PR - #8432

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?

Test cases in Main PR

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/router/src/db/kafka_store.rs	34% smaller
crates/common_utils/src/types/keymanager.rs	0% smaller
crates/hyperswitch_domain_models/src/payments/payment_intent.rs	0% smaller
crates/router/src/core/payments/operations/payment_confirm.rs	0% smaller
crates/router/src/core/payments/operations/payment_update.rs	0% smaller