feat(qdrant-sync): add gzip compression before transfer to reduce upload size

scripts/qdrant-sync.sh

@@ -69,43 +69,52 @@ echo "⬇️  2/5 Downloading snapshot..."
 curl --max-time $TIMEOUT -s -o "$WORK_DIR/$SNAPSHOT_NAME" "$LOCAL_QDRANT_URL/collections/$COLLECTION/snapshots/$SNAPSHOT_NAME"
 echo "   ✅ Downloaded to $WORK_DIR/$SNAPSHOT_NAME"
 
-# 3. Transfer Snapshot
-echo "📤 3/5 Uploading snapshot to Alpha ($SSH_HOST)..."
+# 3. Compress and Transfer Snapshot
+echo "📦 3/6 Compressing snapshot to save bandwidth..."
+gzip -c "$WORK_DIR/$SNAPSHOT_NAME" > "$WORK_DIR/$SNAPSHOT_NAME.gz"
+echo "   ✅ Compressed $SNAPSHOT_NAME.gz"
+
+echo "📤 4/6 Uploading compressed snapshot to Alpha ($SSH_HOST)..."
 SSH_OPTS="-o ServerAliveInterval=60 -o ServerAliveCountMax=10 -o ConnectTimeout=30"
 ssh $SSH_OPTS "$SSH_HOST" "mkdir -p $TGT_PATH/qdrant_tmp"
 rsync --partial --progress --timeout=600 -e "ssh $SSH_OPTS" \
-  "$WORK_DIR/$SNAPSHOT_NAME" "$SSH_HOST:$TGT_PATH/qdrant_tmp/$SNAPSHOT_NAME"
+  "$WORK_DIR/$SNAPSHOT_NAME.gz" "$SSH_HOST:$TGT_PATH/qdrant_tmp/$SNAPSHOT_NAME.gz"
 echo "   ✅ Upload complete."
 
 # 4. Restore Snapshot on Remote Server
-echo "🔄 4/5 Restoring snapshot on target container ($QDRANT_CONTAINER)..."
+echo "🔄 5/6 Restoring snapshot on target container ($QDRANT_CONTAINER)..."
 
 # Qdrant restore process:
+# - Extract snapshot on server
 # - Recreate collection (so it is clean)
 # - Download snapshot to container
 # - Recover from snapshot file
 
 ssh $SSH_OPTS "$SSH_HOST" << EOF
   set -e
-  # Step A: Copy file into the container
+  # Step A: Extract the compressed file
+  echo "   [Remote] Extracting snapshot..."
+  gunzip -f "$TGT_PATH/qdrant_tmp/$SNAPSHOT_NAME.gz"
+
+  # Step B: Copy file into the container
   docker cp "$TGT_PATH/qdrant_tmp/$SNAPSHOT_NAME" $QDRANT_CONTAINER:/qdrant/$SNAPSHOT_NAME
 
-  # Step B: Delete existing collection
+  # Step C: Delete existing collection
   curl -s -X DELETE "http://127.0.0.1:6333/collections/$COLLECTION" > /dev/null
 
-  # Step C: Re-create empty collection (required before recovery)
+  # Step D: Re-create empty collection (required before recovery)
   # wir nutzen die standard vector config vom Kabelfachmann (Cosine, 384 dim für all-MiniLM-L6-v2)
   curl -s -X PUT "http://127.0.0.1:6333/collections/$COLLECTION" \
     -H 'Content-Type: application/json' \
     -d '{ "vectors": { "size": 384, "distance": "Cosine" } }' > /dev/null
 
-  # Step D: Recover
+  # Step E: Recover
   echo "   [Remote] Triggering recover API..."
   curl -s -X PUT "http://127.0.0.1:6333/collections/$COLLECTION/snapshots/recover" \
     -H 'Content-Type: application/json' \
     -d '{ "location": "file:///qdrant/'$SNAPSHOT_NAME'" }' > /dev/null
 
-  # Step E: Cleanup
+  # Step F: Cleanup
   docker exec $QDRANT_CONTAINER rm /qdrant/$SNAPSHOT_NAME
   rm -rf "$TGT_PATH/qdrant_tmp"
 EOF
@@ -113,7 +122,7 @@ EOF
 echo "   ✅ Restore complete."
 
 # 5. Local Cleanup
-echo "🧹 5/5 Cleaning up..."
+echo "🧹 6/6 Cleaning up..."
 rm -rf "$WORK_DIR"
 # Delete snapshot from local Qdrant server to save space
 curl -s -X DELETE "$LOCAL_QDRANT_URL/collections/$COLLECTION/snapshots/$SNAPSHOT_NAME" > /dev/null