fix: add offset and limit to key transfer API

[dracarys18]

Type of Change

• Enhancement

Description

Add offset and limit to key transfer API

Motivation and Context

This adds from and limit parameters to Key transfer API and thus providing a way to transfer the keys in batches.

How did you test it?

1. Run /accounts/transfer with from and limit parameters. It should respond with the total_transferred same as limit.

curl --location 'http://localhost:8080/accounts/transfer' \
--header 'Content-Type: application/json' \
--header 'api-key: test_admin' \
--data '{
    "from": 0,
    "limit": 2
}'

2. Do the same thing for user/key/transfer

curl --location 'http://localhost:8080/user/key/transfer' \
--header 'Content-Type: application/json' \
--header 'api-key: test_admin' \
--data '{
    "from": 0,
    "limit": 2
}'

Checklist

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

[vspecky]

LGTM