perf: use bytes instead of text for config table

[dracarys18]

Type of Change

• Enhancement

Description

Changed the data type of Config to Bytes instead of Text.

Additional Changes

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

Motivation and Context

Bytes can be serialized and deserialized much faster than strings hence use Bytes than String for arbitrary data storage.

How did you test it?

• Did Sanity testing of Payments,Refunds
• Create a config

curl --location 'http://localhost:8080/configs/' \
--header 'Content-Type: application/json' \
--header 'api-key: test_admin' \
--data '{
    "key": "xdxdxdxdxd",
    "value": "2:lol"
}'

• Fetch the config

curl --location 'http://localhost:8080/configs/xdxdxdxdxd' \
--header 'api-key: test_admin'

• Update the config

curl --location 'http://localhost:8080/configs/xdxdxdxdxd' \
--header 'Content-Type: application/json' \
--header 'api-key: test_admin' \
--data '{
    "key": "xdxdxdxdxd",
    "value": "2:kek"
}'

Checklist

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