Reorganize polars: move dataframe results, drop parquet_ prefix

- polars/results/20241129/DataFrame_c6a.metal.json moved to
  polars-dataframe/results/20241129/c6a.metal.json (the run is
  system="Polars (DataFrame)", so it belongs in polars-dataframe).
- polars/results/{20241129,20241215}/parquet_c6a.metal.json /
  parquet_c6a.4xlarge.json renamed to drop the parquet_ prefix
  (parquet is the default encoding for polars/, so the prefix is
  redundant — polars-dataframe/ is the dataframe variant).
- Historical tag dropped from all three renamed files.

The pre-existing canonical c6a.metal.json / c6a.4xlarge.json in those
date dirs were re-runs that ended up there because their date field
wasn't updated when the data was refreshed in commit 69d3e50;
the renamed files carry the actual 2024-11-29 / 2024-12-15 numbers.

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

Author: alexey-milovidov

polars-dataframe/results/20241129/c6a.metal.json

@@ -3,14 +3,10 @@
     "date": "2024-11-29",
     "machine": "c6a.metal",
     "cluster_size": 1,
-    "proprietary": "no",
-    "hardware": "cpu",
     "tuned": "no",
+    "comment": "",
     "tags": [
-        "column-oriented",
-        "dataframe",
-        "in-memory",
-        "lukewarm-cold-run"
+        "column-oriented"
     ],
     "load_time": 2,
     "data_size": 14779976446,
@@ -21,99 +17,99 @@
             0.0
         ],
         [
-            0.031,
+            0.032,
             0.032,
             0.032
         ],
         [
             0.477,
-            0.467,
-            0.449
+            0.468,
+            0.45
         ],
         [
             0.071,
-            0.07,
-            0.07
+            0.071,
+            0.071
         ],
         [
             2.057,
-            1.754,
+            1.755,
             1.163
         ],
         [
             3.361,
-            3.361,
+            3.362,
             3.356
         ],
         [
             0.022,
-            0.017,
+            0.018,
             0.017
         ],
         [
-            0.034,
-            0.039,
+            0.035,
+            0.04,
             0.037
         ],
         [
-            1.192,
+            1.193,
             0.933,
-            0.986
+            0.987
         ],
         [
-            1.123,
+            1.124,
             1.063,
-            1.235
+            1.236
         ],
         [
-            0.469,
-            0.485,
+            0.47,
+            0.486,
             0.469
         ],
         [
             0.496,
-            0.522,
+            0.523,
             0.429
         ],
         [
-            0.611,
-            0.63,
-            0.683
+            0.612,
+            0.631,
+            0.684
         ],
         [
-            0.695,
+            0.696,
             0.725,
-            0.766
+            0.767
         ],
         [
-            0.75,
-            0.713,
+            0.751,
+            0.714,
             0.684
         ],
         [
-            0.859,
+            0.86,
             0.993,
             0.917
         ],
         [
             2.769,
-            2.349,
-            2.243
+            2.35,
+            2.244
         ],
         [
-            2.026,
+            2.027,
             1.925,
             1.947
         ],
         [
             4.853,
-            4.48,
+            4.481,
             4.586
         ],
         [
+            0.066,
             0.065,
-            0.065,
-            0.065
+            0.066
         ],
         [
             1.928,
@@ -122,97 +118,97 @@
         ],
         [
             2.135,
-            2.135,
-            2.139
+            2.136,
+            2.14
         ],
         [
-            4.494,
-            4.506,
-            4.513
+            4.495,
+            4.507,
+            4.514
         ],
         [
             1.97,
             1.962,
-            1.946
+            1.947
         ],
         [
             0.528,
-            0.507,
-            0.505
+            0.508,
+            0.506
         ],
         [
-            0.946,
-            0.946,
-            0.941
+            0.947,
+            0.947,
+            0.942
         ],
         [
             1.625,
-            1.613,
-            1.61
+            1.614,
+            1.611
         ],
         [
-            3.961,
+            3.962,
             3.929,
             4.038
         ],
         [
-            57.451,
-            57.806,
+            57.452,
+            57.807,
             58.076
         ],
         [
-            1.657,
+            1.658,
             1.595,
             1.604
         ],
         [
             0.787,
-            0.805,
-            0.773
+            0.806,
+            0.774
         ],
         [
-            1.04,
+            1.041,
             1.092,
-            0.983
+            0.984
         ],
         [
             6.117,
             5.623,
-            5.64
+            5.641
         ],
         [
             3.398,
-            3.133,
+            3.134,
             3.203
         ],
         [
-            3.296,
-            3.172,
+            3.297,
+            3.173,
             3.198
         ],
         [
-            0.576,
+            0.577,
             0.45,
-            0.536
+            0.537
         ],
         [
             0.352,
-            0.3,
+            0.301,
             0.299
         ],
         [
-            0.75,
+            0.751,
             0.342,
-            0.352
+            0.353
         ],
         [
-            0.244,
-            0.236,
-            0.232
+            0.245,
+            0.237,
+            0.233
         ],
         [
-            0.25,
-            0.264,
+            0.251,
+            0.265,
             0.25
         ],
         [
@@ -222,13 +218,13 @@
         ],
         [
             0.501,
-            0.287,
+            0.288,
             0.285
         ],
         [
             0.213,
-            0.211,
-            0.205
+            0.212,
+            0.206
         ]
     ]
 }