fix(debug): include request amount in swap failure logs

Add the `amount` field to debug output in `logSwapExecutionFailure` so
both sides of a quote are visible: the requested amount and the quoted
amount. For fixed-input swaps this shows the requested input; for
fixed-output swaps it shows the requested output. The field is only
present on `SwapQuote` objects, so a runtime check guards access.

Author: drichar

packages/haystack/src/debug.ts

@@ -32,6 +32,10 @@ export function logSwapExecutionFailure(
       fromASAID: context.quote.fromASAID,
       toASAID: context.quote.toASAID,
       type: context.quote.type,
+      amount:
+        'amount' in context.quote
+          ? context.quote.amount.toString()
+          : undefined,
       quote: context.quote.quote.toString(),
       requiredAppOptIns: context.quote.requiredAppOptIns,
       route: context.quote.route?.map((r) => ({