test(release-cleanup): 補強逾時、非陣列、token 邊界與 failError 測試

新增 fetchAllPages 的 AbortError 逾時與非陣列回應測試、loadConfig 的
GITEA_TOKEN 邊界測試,以及 logger.failError 測試。測試共 47 項全數通過。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/test/gitea-client.test.js

@@ -90,6 +90,28 @@ test('fetchAllPages 在回應非 JSON 時丟出例外', async () => {
   )
 })
 
+test('fetchAllPages 在回應為非陣列 JSON 時丟出例外', async () => {
+  globalThis.fetch = async () => jsonResponse({ message: 'error object' })
+  const client = new GiteaClient({})
+  await assert.rejects(
+    () => client.fetchAllPages('https://example.com/api'),
+    /non-array JSON payload/,
+  )
+})
+
+test('fetchAllPages 在 fetch 因逾時拋出 AbortError 時向外拋出', async () => {
+  globalThis.fetch = async () => {
+    const err = new Error('The operation was aborted due to timeout')
+    err.name = 'AbortError'
+    throw err
+  }
+  const client = new GiteaClient({})
+  await assert.rejects(
+    () => client.fetchAllPages('https://example.com/api'),
+    (err) => err.name === 'AbortError',
+  )
+})
+
 test('deleteResource 回傳 HTTP 狀態碼', async () => {
   globalThis.fetch = async (url, opts) => {
     assert.equal(opts.method, 'DELETE')