fix: add failure reason for internal "new episode" response

src/controllers/internal/new-episode/index.ts

@@ -69,7 +69,10 @@ app.post(
         readEnvVariable(env<Env, typeof c>(c, "workerd"), "QSTASH_TOKEN"),
         c.req,
       );
-      return c.json(ErrorResponse, { status: 500 });
+      return c.json(
+        { success: false, message: "Failed to fetch episodes" },
+        500,
+      );
     }
 
     const { episodes, providerId } = fetchEpisodesResult;
@@ -81,7 +84,7 @@ app.post(
         readEnvVariable(env<Env, typeof c>(c, "workerd"), "QSTASH_TOKEN"),
         c.req,
       );
-      return c.json(ErrorResponse, { status: 404 });
+      return c.json({ success: false, message: "Episode not found" }, 404);
     }
 
     let fetchUrlResult;
@@ -98,7 +101,10 @@ app.post(
           readEnvVariable(env<Env, typeof c>(c, "workerd"), "QSTASH_TOKEN"),
           c.req,
         );
-        return c.json(ErrorResponse, { status: 404 });
+        return c.json(
+          { success: false, message: "Episode URL not found" },
+          404,
+        );
       }
     } catch (error) {
       console.error(`Failed to fetch episode URL for episode ${episode.id}`);
@@ -106,7 +112,10 @@ app.post(
         readEnvVariable(env<Env, typeof c>(c, "workerd"), "QSTASH_TOKEN"),
         c.req,
       );
-      return c.json(ErrorResponse, { status: 500 });
+      return c.json(
+        { success: false, message: "Failed to fetch episode URL" },
+        500,
+      );
     }
 
     const tokens = await getTokensSubscribedToTitle(