fix(ocp): pass through rate directly when calculating valueExchange for USDC

Signed-off-by: Brandon McAnsh <git@bmcreations.dev>

Author: bmc08gt

services/opencode/src/main/kotlin/com/getcode/opencode/model/financial/LocalFiat.kt

@@ -78,8 +78,10 @@ data class LocalFiat(
                 // this doesn't need a calculated value exchange since we are USDC
                return if (rate.currency != CurrencyCode.USD) {
                    LocalFiat(
-                       usdc = usdValue,
-                       nativeAmount = amount
+                       underlyingTokenAmount = usdValue,
+                       nativeAmount = amount,
+                       rate = rate,
+                       mint = token.address,
                    )
                } else {
                    LocalFiat(usdc = usdValue)