transfer events order

[krogla]

• fix transfer events order (for subgraph)
• check hasInitialized on resume
• refactor bootstrap initial holder

[folkyatina]

Looks good and even close the issue 5.2 from the old audit that we previously acknowledged.

One thing bothers me:

• INITIAL_TOKEN_HOLDER defined in StETH, but used in Lido.
• StETH is not actually usable without calling _bootstrapInitialHolder() but nothing in StETH tells you about it.

But I'm not sure what is the best thing to do here. Probably, adding explicit _mintInitialShares() or at least a comment will work.

[TheDZhon]

👍 Thank you for delivering this

Pushed a bit of chore changes.
Left a few suggestions on the code structure itself.