nit: move logger child names into a constant

[quiet-node]

Problem

Currently, there are many child instances of the logger instantiated with abitrary names. They all can be grouped in a constant.

Solution

For example:

// constants.ts
LOGGER_CHILD_NAME: {
    ....
    cacheService: 'cache-service',
}

// relay.ts

...
- this.cacheService = new CacheService(logger.child({ name: 'cache-service' }), register);
+ this.cacheService = new CacheService(logger.child({ name: constants.LOGGER_CHILD_NAME.cacheService }), register);
...

Alternatives

No response