Add panorama previews and repair beta export rendering

worker/main.ts

@@ -179,7 +179,7 @@ async function processJob(job: {
       );
       const report = await renderSnapshot(
         terrain,
-        manifest.viewpoints,
+        manifest.availableViewpoints ?? manifest.viewpoints,
         output,
         {
           size: Number(process.env.MINEGEO_FACE_SIZE || 1024),
@@ -196,7 +196,7 @@ async function processJob(job: {
         .webp({ quality: 90 })
         .toFile(`${output}/map.webp`);
       let processedFaces = 0;
-      for (const point of manifest.viewpoints) {
+      for (const point of manifest.availableViewpoints ?? manifest.viewpoints) {
         await mkdir(`${output}/${point.id}`, { recursive: true });
         for (const face of faces) {
           const bytes = await readFile(
@@ -257,7 +257,8 @@ async function processJob(job: {
                   {
                     contentType: "image/webp",
                     upsert: true,
-                    cacheControl: "31536000",
+                    // Drafts can be repaired before publication.
+                    cacheControl: "60",
                   },
                 ),
             );