Api vault investor history

The vault investor history returned by the service to client

Name `Lite`	Type	Required `Default`	Description
event_time `et`	string	True	Time at which the event was emitted in unix nanoseconds
off_chain_account_id `oc`	string	True	The off chain account id of the investor, only visible to the manager
vault_id `vi`	string	True	The unique identifier of the vault.
type `t`	VaultInvestorAction	True	The type of transaction that occurred. List of types: vaultInvest, vaultBurnLpToken, vaultRedeem
price `p`	string	True	The price of the vault LP tokens at the time of the event.
size `s`	string	True	The amount of Vault LP tokens invested or redeemed.
realized_pnl `rp`	string	True	The realized PnL of the vault.
performance_fee `pf`	string	True	The performance fee of the vault.