[Validator API Fix]support validator txn with its events.

[larry-aptos]

Description

• This is to supports events from validator transactions with events migrated from BlockMetadataTransaction.

Backfill

• First validator transaction in mainnet: 554229017
• First validator transaction in testnet: 942054324

Test Plan

Tested in devnet and looks good.

[rtso]

Besides delegated staking activities, are there other staking models that need to be indexed? I'd imagine we also need to index the wsc of validator txn's

[larry-aptos]

updated; all i did is for the places that requires match TxnData:: branching logic, I added Validator condition..

but for if TxnData::User, I ignored them since they're usually specific to user transactions.

[rtso]

We need to parse all the wsc in ValidatorTransaction now, because there might be delegator resource changes in them. Like here:

aptos-indexer-processors/rust/processor/src/db/common/models/stake_models/delegator_pools.rs

Line 119 in 98386c6

if let TxnData::User(_) = txn_data {

[larry-aptos]

wait.. but this event was moved from BlockMetadtaTransaciton, does this mean we forgot to handle the writesetchanges in BlockMetadataTransaciton?

[rtso]

Do you have the proto txn? We can take a look at what's in it.

[larry-aptos]

https://gist.github.com/larry-aptos/bfb876716dc617c5717c312d2f7c8255 checking

[rtso]

Could you update the description with testnet and mainnet backfill versions? Which version did the first validator txn appear?

[larry-aptos]

Addressed the comments; ready for another review.