Fix operator address format and add address to response

[jianoaix]

Why are these changes needed?

• Fix a bug in address formatting: we use lower case and mixed case together, which makes it not able to match operators
• Add operator address to response, this will make it easier because operators look at the data by address

Tested:
Ran locally and got:

{"meta":{"size":44},"data":[{"operator_id":"0x1c6b5141b14413d1272da7d09584e2a62d1074b836d41bb10ac34e87df41f3be","operator_address":"0xdc59c4d517758e943ded1574f20b10c6bfc0f04c","quorum_id":0,"total_unsigned_batches":434,"total_batches":434,"percentage":100},{"operator_id":"0x1d440e1f3778d49fac0276a77e4e4890973ca6e30188d774819654d6857528b1","operator_address":"0xd99b2e164f9f29e530fe40d4a0d8c60f5159b393","quorum_id":0,"total_unsigned_batches":174,"total_batches":174,"percentage":100},{"operator_id":"0x2e3c05fce3527d4ebac0a63d358882b2fb7fa480df459ec98c542222bf3117c9","operator_address":"0x0d0ced7081e0451abd87f976f21c406527f5c90b","quorum_id":0,"total_unsigned_batches":818,"total_batches":818,"percentage":100},{"operator_id":"0x31e3ea7e75e64b750002f6a66fa5c89862fbf12752a803721fee839ceae31025","operator_address":"0x715f4e7584bab8c5664cc2a95717642fab2cc507","quorum_id":0,"total_unsigned_batches":1054,"total_batches":1054,"percentage":100},{"operator_id":"0x3e819c50cd9c86c5ef1a900401f95190f65fc6f061125421bfa03f0f0ae56eba","operator_address":"0x0fef87dba8aa3a1f3a7665b51ca341e137ef96fe","quorum_id":0,"total_unsigned_batches":250,"total_batches":250,"percentage":100},{"operator_id":"0x4c564d7c1ed0a745422a5d785b718597dba9d529d87d340a401c7319c5c3aa61","operator_address":"0xf7b07211eb70b5baded30e3e74712bcc2008a01f","quorum_id":0,"total_unsigned_batches":818,"total_batches":818,"percentage":100},{"operator_id":"0x4f307f051b6a228a933e0dd8edbd9a9aac950a9e9b75959e93bdb2d9ae453ada","operator_address":"0xe3c694453d69caea4edcbb0bb8d24accc6932565","quorum_id":0,"total_unsigned_batches":1054,"total_batches":1054,"percentage":100},{"operator_id":"0x6a066d2fd8f0815fb347bcfe0fd45eea3e6d3bc2ebe2faaf936a6110835c4708","operator_address":"0x2612a26eb9c5b6f002cb40789d9b4b49c710ea17","quorum_id":0,"total_unsigned_batches":881,"total_batches":881,"percentage":100},{"operator_id":"0x6b0fcc986aca6c4b5f8272683d61612da8cc65c1760c505fd585b5cbc0a99c5d","operator_address":"0xced4bd09bba9a4487d2255f84fcce402420038ef","quorum_id":0,"total_unsigned_batches":794,"total_batches":794,"percentage":100},{"operator_id":"0x70ccb39b4bdcd7769eaaf1face9068a8b061f7a3e447492bd1dacf43ac3e79b7","operator_address":"0x7c2eb067bd97cc7b798cf6b3d3cc18508775946f","quorum_id":0,"total_unsigned_batches":426,"total_batches":426,"percentage":100},{"operator_id":"0x817c119843de860391090aa01bb39731066838977745be7467f549f8c28a79b5","operator_address":"0xd7c1d2b609390683bbdd185130ceb748eb2e7310","quorum_id":0,"total_unsigned_batches":1064,"total_batches":1064,"percentage":100},{"operator_id":"0x95cead86f8bad3f605a1522c9e8fa893b7c6154ca27047b60520fad763269041","operator_address":"0x5f27203659c240cdf910999642e257fef0e96077","quorum_id":0,"total_unsigned_batches":386,"total_batches":386,"percentage":100},{"operator_id":"0x9f018fa5c580cce497c54832c0e955baae268cd2b279c40fc155f37cadcf3df6","operator_address":"0x78fdde7a5006cc64e109aed99ca7b0ad3d8687bb","quorum_id":1,"total_unsigned_batches":2,"total_batches":2,"percentage":100},{"operator_id":"0xa2e6ec89b8afeed41cb3d919b835e6b5c4b85c917b7e869b8e6c4367007044ad","operator_address":"0xd8f642848bfcaae2119ba1781117557ff45b1db4","quorum_id":0,"total_unsigned_batches":1052,"total_batches":1052,"percentage":100},{"operator_id":"0xd1a82f31c4f97e4de3dfbd517bcf0b71fb0520e475015e915ee114cb36740129","operator_address":"0xd847062ff3e50d6cec36f7d1b8923bf597768b6d","quorum_id":0,"total_unsigned_batches":1124,"total_batches":1124,"percentage":100},{"operator_id":"0xe02eb821060cd7b07b2f998d5409117190a38200eff09700ffaa322c5819008d","operator_address":"0x51b38dfab8b4266e0cdd76bfa6941792ae19738d","quorum_id":0,"total_unsigned_batches":843,"total_batches":843,"percentage":100},{"operator_id":"0xedfa99ef794eb370cc98cf23a9812d5fee6003eb313032e75d9e6cd55703e67c","operator_address":"0xc7b8134e0589deb7534fd0c68d0fbf707959b713","quorum_id":0,"total_unsigned_batches":1054,"total_batches":1054,"percentage":100},{"operator_id":"0xefb45317c27a2b82a1c6f8d939a14b769e53b677e19a53665d03ce8e376df45f","operator_address":"0xfc837b01d4196dca9d441e42ac792484bab96d11","quorum_id":0,"total_unsigned_batches":120,"total_batches":120,"percentage":100},{"operator_id":"0xf3cbbd02a20044c58ed57c8dfee9fd5d70858c3d3f449051651f0d5649031ac1","operator_address":"0xbc0a9e6ddb719aabc1da9783bc91c37401b3daea","quorum_id":0,"total_unsigned_batches":803,"total_batches":803,"percentage":100},{"operator_id":"0x3bb3f206227d6da7e37ac71cba47a501a6c970f384ec23df95fcea1c2cfcf036","operator_address":"0x5cd6d276cc1f8c98175a1e4ffd0313c3967fb9c6","quorum_id":0,"total_unsigned_batches":338,"total_batches":913,"percentage":37.02},{"operator_id":"0x43c1d143eef7164fd2101ca1589cd8fa0c6192e7537c3cf524d06ad07653caf6","operator_address":"0xc369bb3f82a92c1086edf4228b4c190fdf6aea8d","quorum_id":0,"total_unsigned_batches":71,"total_batches":374,"percentage":18.98},{"operator_id":"0x9f018fa5c580cce497c54832c0e955baae268cd2b279c40fc155f37cadcf3df6","operator_address":"0x78fdde7a5006cc64e109aed99ca7b0ad3d8687bb","quo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Checks

• I've made sure the lint is passing in this PR.
• I've made sure the tests are passing. Note that there might be a few flaky tests, in that case, please comment that they are not relevant.
• Testing Strategy
  • Unit tests
  • Integration tests
  • This PR is not tested :(

[ian-shim]

checksummed addresses should also work