Rename Motherduck result.json and clean up paradedb duplicates

- motherduck/results/{20240127,20241029}/result.json renamed to
  result_standard.json. The runs were originally machine="cloud"
  (back when Motherduck only offered one tier); update machine to
  "Motherduck: standard" to match current naming and drop the
  historical tag.
- paradedb/results/20240202/c6a.4xlarge.1500gb.json deleted —
  identical results to c6a.4xlarge.json next to it; the .1500gb
  filename was a one-off clarification for an Elasticsearch comparison
  per its comment field. The canonical c6a.4xlarge.json carries the
  same numbers without that side-comment.
- paradedb/results/20240713/single.json deleted — same date / system /
  machine / load_time / data_size as the canonical c6a.4xlarge.json
  next to it; results differ only by tiny numerical noise (<= 0.001s).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: alexey-milovidov

motherduck/results/20240127/result.json …ck/results/20240127/result_standard.jsonmotherduck/results/20240127/result.json renamed to motherduck/results/20240127/result_standard.json motherduck/results/20240127/result.json renamed to motherduck/results/20240127/result_standard.json

@@ -1,13 +1,12 @@
 {
     "system": "MotherDuck",
     "date": "2024-01-27",
-    "machine": "cloud",
+    "machine": "Motherduck: standard",
     "cluster_size": 1,
     "tags": [
         "C++",
         "column-oriented",
-        "serverless",
-        "historical"
+        "serverless"
     ],
     "load_time": 4122,
     "data_size": 25332035584,

motherduck/results/20241029/result.json …ck/results/20241029/result_standard.jsonmotherduck/results/20241029/result.json renamed to motherduck/results/20241029/result_standard.json motherduck/results/20241029/result.json renamed to motherduck/results/20241029/result_standard.json

@@ -1,13 +1,12 @@
 {
     "system": "MotherDuck",
     "date": "2024-10-29",
-    "machine": "cloud",
+    "machine": "Motherduck: standard",
     "cluster_size": 1,
     "tags": [
         "C++",
         "column-oriented",
-        "serverless",
-        "historical"
+        "serverless"
     ],
     "load_time": 57,
     "data_size": 23620000000,