feat: add comprehensive logging for background refresh

Add detailed logging to verify background refresh is working:
- Log when background refresh is triggered
- Log the response status and result from refresh endpoint
- Log errors if refresh fetch fails
- Add logging in refresh endpoint to track:
  - When refresh starts
  - When metadata is found
  - When metadata is cached
  - Any errors during refresh

This will help diagnose if background refresh is actually
populating the Redis cache after timeouts.

api/article-og-refresh.ts

@@ -8,6 +8,7 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
   const expectedSecret = process.env.OG_REFRESH_SECRET || ''
   
   if (providedSecret !== expectedSecret) {
+    console.error('Background refresh unauthorized: secret mismatch')
     return res.status(401).json({ error: 'Unauthorized' })
   }
 
@@ -16,19 +17,24 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
     return res.status(400).json({ error: 'Missing naddr parameter' })
   }
 
+  console.log(`Background refresh started for ${naddr}`)
+
   try {
-    // Fetch metadata via relays (WebSockets)
+    // Fetch metadata via relays (WebSockets) - no timeout, let it take as long as needed
     const meta = await fetchArticleMetadataViaRelays(naddr)
     
     if (meta) {
+      console.log(`Background refresh found metadata for ${naddr}:`, { title: meta.title, summary: meta.summary?.substring(0, 50) })
       // Store in Redis
       await setArticleMeta(naddr, meta)
+      console.log(`Background refresh cached metadata for ${naddr}`)
       return res.status(200).json({ ok: true, cached: true })
     } else {
+      console.log(`Background refresh found no metadata for ${naddr}`)
       return res.status(200).json({ ok: true, cached: false })
     }
   } catch (err) {
-    console.error('Error refreshing article metadata:', err)
+    console.error(`Error refreshing article metadata for ${naddr}:`, err)
     return res.status(500).json({ error: 'Internal server error' })
   }
 }

api/article-og.ts

@@ -67,13 +67,21 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
       ? `${req.headers['x-forwarded-proto']}://${req.headers['x-forwarded-host']}`
       : `https://read.withboris.com`
     
-    fetch(`${origin}/api/article-og-refresh?naddr=${encodeURIComponent(naddr)}`, {
+    const refreshUrl = `${origin}/api/article-og-refresh?naddr=${encodeURIComponent(naddr)}`
+    console.log(`Triggering background refresh for ${naddr}`)
+    
+    fetch(refreshUrl, {
       method: 'POST',
       headers: { 'x-refresh-key': secret },
       keepalive: true
-    }).catch(() => {
-      // Ignore errors in background refresh trigger
     })
+      .then(async (resp) => {
+        const result = await resp.json().catch(() => ({}))
+        console.log(`Background refresh response for ${naddr}:`, { status: resp.status, result })
+      })
+      .catch((err) => {
+        console.error(`Background refresh failed for ${naddr}:`, err)
+      })
   }
 
   // Generate and send HTML