feat(customer_v2): added list customer v2 end point

[sahkal]

Type of Change

• New feature

Description

added list customer v2 end point

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?

curl --location --request GET 'http://localhost:8080/customers/list' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_OjZKeuRKvu0tSy0jrfMOMFftsVZPsNnjFWBGk89cLnoG9bj3jjHXOw5rgIXM1jl8' \
--data '
'

Response

[
    {
        "customer_id": "cus_xXzukJslGlJr5NnL8Uzg",
        "name": "John Doe",
        "email": "guest@example.com",
        "phone": "999999999",
        "phone_country_code": "+65",
        "description": "First customer",
        "address": null,
        "created_at": "2024-08-23T09:58:55.515Z",
        "metadata": {
            "udf1": "value1",
            "new_customer": "true",
            "login_date": "2019-09-10T10:11:12Z"
        },
        "default_payment_method_id": null
    }
]

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