feat: create key in encryption service for merchant and user

[dracarys18]

Type of Change

• New feature

Description

This PR adds support to

• Create Key for every User and Merchant during User and Merchant Account Create.
• Add an API to transfer Keys to KeyManager
• Add MTLS for KeyManager Client

Additional Changes

• This PR modifies application configuration/environment variables

Motivation and Context

• Create Key in Key Manager for every merchant

How did you test it?

Tests for Create a Merchant

curl --location 'http://localhost:8080/accounts' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: test_admin' \
--data-raw '{
  "merchant_id": "merchant_1720435957",
  "locker_id": "m0010",
  "merchant_name": "NewAge Retailer",
  "merchant_details": {
    "primary_contact_person": "John Test",
    "primary_email": "[email protected]",
    "primary_phone": "sunt laborum",
    "secondary_contact_person": "John Test2",
    "secondary_email": "[email protected]",
    "secondary_phone": "cillum do dolor id",
    "website": "www.example.com",
    "about_business": "Online Retail with a wide selection of organic products for North America",
    "address": {
      "line1": "1467",
      "line2": "Harrison Street",
      "line3": "Harrison Street",
      "city": "San Fransico",
      "state": "California",
      "zip": "94122",
      "country": "US"
    }
  },
  "return_url": "https://google.com/success",
  "webhook_details": {
    "webhook_version": "1.0.1",
    "webhook_username": "ekart_retail",
    "webhook_password": "password_ekart@123",
    "payment_created_enabled": true,
    "payment_succeeded_enabled": true,
    "payment_failed_enabled": true
  },
  "sub_merchants_enabled": false,
  "metadata": {
    "city": "NY",
    "unit": "245"
  },
  "primary_business_details": [
    {
      "country": "US",
      "business": "default"
    }
  ]
}'

• Verify /key/create to Keymanager was succeeded.
  The response status of keymanager_response should be 200

Create Key for User

• Signin with the account and password

curl --location 'http://localhost:8080/user/v2/signin?token_only=true' \
--header 'Content-Type: application/json' \
--data-raw '{
 "email": "[email protected]",
    "password": "gagagagag@1234"
}'

• Begin TOTP flow

curl --location 'http://localhost:8080/user/2fa/totp/begin' \
--header 'Authorization: Bearer spt'

• Verify that call to /key/create is successful in the logs

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code

[ArjunKarthik]

LGTM