smartcredit: fix TVL, add borrowed & staking based on fixed income funds

[anuragmath]

Summary

This PR refactors the SmartCredit adapter to rely solely on on-chain event data instead of GraphQL. It correctly calculates TVL, borrowed, and staking values based on factory events and fixed income fund details.

Key Changes

• Uses factory events (FixedIncomeFundCreationComplete, LoanContractCreated) to find all pools and loans.

• Calculates TVL as:

    Deposited underlying tokens in fixed income funds.
  
    Collateral tokens locked in loan contracts.
  

• Calculates borrowed value from invested amounts in fixed income funds, consistent with protocol logic.

• Separates SMARTCREDIT token staking values from TVL.

[llamabutler]

The adapter at projects/smartcredit.js exports TVL:

ethereum                  897.15 k
ethereum-borrowed         271.27 k
borrowed                  271.27 k
ethereum-staking          262.11 k
staking                   262.11 k

total                    897.15 k 

[llamabutler]

The adapter at projects/smartcredit.js exports TVL:

ethereum                  974.67 k
ethereum-borrowed         276.99 k
borrowed                  276.99 k
ethereum-staking          0.00
staking                   0.00

total                    974.67 k