Create a new table `vault` to store the encrypted card details

[ShankarSinghC]

Table: vault

Column	Type	Default	Description	Example
vault_id	VARCHAR		Unique identifier of the vault	f_NPDtNrr1OpcSQF7peTpH2
entity_id	VARCHAR		Unique identifier of the entity	pOJKY86i03t7V0dhBsXQ3
encrypted_data	BYTEA		Encrypted data	0x1234567890abcdef
created_at	TIMESTAMP	TIMESTAMP::now()	Creation timestamp	2020-01-01 00:00:00
expires_at	TIMESTAMP		Expiry timestamp	2020-01-01 00:00:00