refactor: Replace generic AnilistDurableObject fetch endpoint with dedicated methods and update their usage.

src/controllers/internal/upcoming-titles/anilist.ts

@@ -30,27 +30,12 @@ export async function getUpcomingTitlesFromAnilist(req: HonoRequest) {
   let shouldContinue = true;
 
   do {
-    const response = await stub.fetch("http://anilist-do/graphql", {
-      method: "POST",
-      headers: {
-        "Content-Type": "application/json",
-      },
-      body: JSON.stringify({
-        operationName: "GetUpcomingTitles",
-        variables: {
-          page: currentPage++,
-          airingAtLowerBound: lastCheckedScheduleAt,
-          airingAtUpperBound: twoDaysFromNow,
-        },
-      }),
-    });
+    const Page = await stub.getUpcomingTitles(
+      currentPage++,
+      lastCheckedScheduleAt,
+      twoDaysFromNow,
+    );
 
-    if (!response.ok) {
-      // If failed, break loop or handle error. For now, break.
-      break;
-    }
-
-    const Page = (await response.json()) as any;
     if (!Page) break;
 
     const { airingSchedules, pageInfo } = Page;