fix: remove duplicate exports and add test preload for global log

- Remove duplicate `export { waitUntil }` from wait-until.ts (already
  exported via `export const waitUntil`)
- Remove duplicate `export { dedent }` from dedent.ts (already exported
  via `export function dedent`)
- Add bunfig.toml with test preload to set up global `log` and
  `String.dedent` before tests run, matching what configureLogger()
  does at CLI startup

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: frostebite

bunfig.toml

@@ -0,0 +1,2 @@
+[test]
+preload = ["./src/test-preload.ts"]

src/module/dedent.ts

@@ -50,5 +50,3 @@ export function dedent(template: TemplateStringsArray | string, ...values: unkno
 
   return string;
 }
-
-export { dedent };

src/module/wait-until.ts

@@ -278,4 +278,3 @@ type Scheduler = {
   schedule: ScheduleFn;
 };
 
-export { waitUntil };

src/test-preload.ts

@@ -0,0 +1,19 @@
+// Test preload: set up global `log` and `String.dedent` so source files that
+// reference them don't throw ReferenceError during tests.
+import { dedent } from './module/dedent.ts';
+
+String.dedent = dedent;
+
+const noop = () => {};
+
+(globalThis as any).log = {
+  verbosity: 0,
+  isQuiet: false,
+  isVerbose: false,
+  isVeryVerbose: false,
+  isMaxVerbose: false,
+  debug: noop,
+  info: noop,
+  warning: noop,
+  error: noop,
+};