Test 10-min cache (should skip calendar calls)

backfill-proofs.sh

@@ -108,7 +108,18 @@ for COMMIT in $COMMITS; do
         # Cache as pending
         cache_status "$COMMIT" "pending"
         
-        # Try to upgrade existing proof (only contacts calendars if pending)
+        # Skip upgrade if cache is fresh (< 10 min old)
+        CACHE_LINE=$(grep "^$COMMIT:" "$STATUS_CACHE" | tail -1)
+        CACHE_TIME=$(echo "$CACHE_LINE" | cut -d: -f3)
+        NOW=$(date +%s)
+        CACHE_AGE=$((NOW - CACHE_TIME))
+        
+        if [ "$CACHE_AGE" -lt 600 ]; then
+            echo "  - Pending (cached <10min, skipping calendar call)"
+            continue
+        fi
+        
+        # Try to upgrade existing proof (contacts calendars)
         echo "  Upgrading pending proof..."
         if ots upgrade "$PROOF_FILE" 2>/dev/null; then
             echo "  ✓ Upgraded to attested"
@@ -116,6 +127,8 @@ for COMMIT in $COMMITS; do
             UPDATED=$((UPDATED + 1))
         else
             echo "  - Still pending (no upgrade available yet)"
+            # Update cache timestamp
+            cache_status "$COMMIT" "pending"
         fi
     else
         # Generate new proof for this commit