Differentiate FT and RBT transfers under txnType = 02

[aditysoni]

Possible approaches:

1. Lookup on Read:
   Extract the token involved from the transaction and perform a database read to determine their token type. This allows us to classify the transaction as FT or RBT at query time.

2. Store Token Type on Write:
   When writing the transaction record to the database, determine the token type at that point and store it in a dedicated token_type column. This simplifies filtering during retrieval, as no additional lookup is needed.