fix(dex): use sold-token ERC4626 price for Balancer V3 amount_usd fallback

[tiagoponciano]

Summary

• Fixes a bug in enrich_balancer_v3_dex_trades where the ERC4626 fallback for amount_usd multiplied token_sold_amount by the bought token price (erc4626a.price) instead of the sold token price (erc4626b.price).
• Aligns the sold-side USD fallback with the existing joins: erc4626a is keyed on token_bought_address, erc4626b on token_sold_address.

Context

When add_amount_usd_dex_trades does not produce amount_usd, the macro falls back to ERC4626 median prices:

COALESCE(
    dexs.amount_usd,
    dexs.token_bought_amount * erc4626a.price,
    dexs.token_sold_amount * erc4626b.price  -- was erc4626a.price
) AS amount_usd

Using the bought-token price for sold quantity understated or overstated USD volume on trades where only the sold leg is an ERC4626 wrapper and the bought leg is not (or has no price at that minute).

Files changed

File	Change
dbt_subprojects/dex/macros/models/enrich_balancer_v3_dex_trades.sql	token_sold_amount * erc4626a.price → erc4626b.price