Revert "feat: defer sqlite insert to avoid highligth blink (#99)"

[gbprod]

This reverts commit 0dc8e0f.

As it seems to create bugs, I revert until I'll find how to fix it

Ref: #176 #177

[xzbdmw]

Hmm, #176 seems to be caused by setting and reading reg too many times to perform a paste, each time it will sync system clipborad so cause the lag

[folke]

I just noticed the delays again and now know why :)

I'll just switch to the shada backend for now.

[folke]

Is there actually any good reason to use the sqlite backend?
I used sqlite because according to the docs it's supposed to be faster, but in reality it seems much slower from my testing.

[gbprod]

I have to investigate for the root cause of those delays.
Sorry about that, I try to fix it asap ;)

[gbprod]

Is there actually any good reason to use the sqlite backend?

For me, it seems faster but I think I have to make some benchmarks with a lot of entries to be sure of that.