fix: make sure chainIds are strings and unique

[ChaituVR]

Right now UI send chainIds as Int, we need to convert it into string

How to test:

Send request with:

curl --location 'http://localhost:3008' \
--header 'Content-Type: application/json' \
--data '{
    "method": "lookup_domains",
    "params": "0x24F15402C6Bb870554489b2fd2049A85d75B982f",
    "network": 1
}'

[wa0x6e]

tAck

?

[wa0x6e]

tAck