fix(testkit): macOS compat + fix test 8c ordering (#24)

artifacts/api-server/src/lib/btc-oracle.ts

@@ -1,3 +1,7 @@
+import { makeLogger } from "./logger.js";
+
+const logger = makeLogger("btc-oracle");
+
 const COINGECKO_URL =
   "https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd";
 
@@ -42,7 +46,10 @@ export async function getBtcPriceUsd(): Promise<number> {
     return price;
   } catch (err) {
     const fb = fallbackPrice();
-    console.warn(`[btc-oracle] Price fetch failed (using $${fb} fallback):`, err);
+    logger.warn("price fetch failed — using fallback", {
+      fallback_usd: fb,
+      error: err instanceof Error ? err.message : String(err),
+    });
     return fb;
   }
 }