[FIX] Settings listeners not receiving overwritten values from env vars

[sampaiodiego]

Proposed changes (including videos or screenshots)

I've completely changed the order on how things are done during startup so listeners can receive the correct values when they're updated via env vars.

it is done by setting up oplog listener before doing the updates to settings, so if an update happens the correct flow will still happen:

graph LR;
    A([update setting on db])-->B([oplog event triggered]);
    B-->C([received by listener]);
    C-->D([update cache]);
    D-->E([trigger watchers]);

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Issue(s)

Steps to test or reproduce

Further comments

[sampaiodiego]

this is good for review again =) I've completely changed the initial changes, I'm not forcing cache to be updated anymore when a setting value is overwritten, it is now setting up oplog listener before doing the updates, so if an update happens the correct flow will still happen:

graph LR;
    A([update setting on db])-->B([oplog event triggered]);
    B-->C([received by listener]);
    C-->D([update cache]);
    D-->E([trigger watchers]);

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