fix: rename stale payloads: key in upload-config example, add hybrid example

.gitignore

@@ -3,6 +3,7 @@
 *.iml
 
 # Local benchmark data & outputs
+/datasets/
 /tmp-data/
 /logs/
 *.fbin

examples/simple-hybrid.yaml

@@ -0,0 +1,47 @@
+# Example bfb upload config for a simple hybrid (dense + sparse) collection:
+# one 768-d dense vector with turbo-2bit quantization and one zipf-distributed
+# sparse vector, plus a couple of payload fields to filter on.
+#
+#   bfb upload --file examples/simple-hybrid.yaml -n 1M -b 256 -p 16 -t 8 \
+#       --uri http://localhost:6334
+
+collection:
+  name: benchmark
+  id: uuid
+  on_disk_payload: true
+
+  optimizers:
+    default_segment_number: 3
+
+  quantization:
+    type: turbo-2bit
+    always_ram: true
+
+  vectors:
+    - name: image
+      size: 768
+      distance: cosine
+      datatype: float32
+      on_disk: true
+      source: random
+
+  sparse_vectors:
+    - name: bm25
+      on_disk: true
+      source:
+        type: random
+        vocab_size: 100000
+        length: 100
+        distribution: zipf
+
+  fields:
+    - name: a
+      type: keyword
+      source:
+        type: random
+        cardinality: 10
+        values_per_point: 1
+    - name: b
+      type: float
+      source: { type: random, min: -1.0, max: 1.0 }
+

examples/upload-config.yaml

@@ -51,7 +51,7 @@ collection:
         length: 1000
         distribution: zipf        # uniform | zipf
 
-  payloads:
+  fields:
     - name: color
       type: keyword
       source: