Add synthetic test dataset

README.md

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+---
+license: cc0-1.0
+tags:
+- synthetic
+- test-data
+size_categories:
+- n<1K
+---
+
+# nervous-radio-8ab78b
+
+Synthetic products test data: 45 rows in `data.csv`.
+
+All values are randomly generated fictional examples, not real observations, products, or user activity. Intended only for CSV loading and pipeline tests; not suitable for scientific or business conclusions. Columns are sampled independently and do not model real-world correlations.
+
+## Fields
+
+- `sample_id`: random identifier for this generated sample.
+- `row_id`: sequential row number starting at 1.
+- `is_synthetic`: always true.
+- `price_usd`, `stock_units`: simulated values in the units named in each column.

data.csv

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+sample_id,row_id,is_synthetic,price_usd,stock_units
+fdad3f914ef9b31e,1,true,176.85,445
+fdad3f914ef9b31e,2,true,11.15,175
+fdad3f914ef9b31e,3,true,330.46,373
+fdad3f914ef9b31e,4,true,456.9,170
+fdad3f914ef9b31e,5,true,300.54,335
+fdad3f914ef9b31e,6,true,247.27,357
+fdad3f914ef9b31e,7,true,492.36,279
+fdad3f914ef9b31e,8,true,32.21,128
+fdad3f914ef9b31e,9,true,321.81,336
+fdad3f914ef9b31e,10,true,265.0,401
+fdad3f914ef9b31e,11,true,178.46,491
+fdad3f914ef9b31e,12,true,307.2,130
+fdad3f914ef9b31e,13,true,5.22,41
+fdad3f914ef9b31e,14,true,297.09,198
+fdad3f914ef9b31e,15,true,405.68,164
+fdad3f914ef9b31e,16,true,262.95,364
+fdad3f914ef9b31e,17,true,366.37,94
+fdad3f914ef9b31e,18,true,381.22,394
+fdad3f914ef9b31e,19,true,377.17,315
+fdad3f914ef9b31e,20,true,187.91,56
+fdad3f914ef9b31e,21,true,392.97,120
+fdad3f914ef9b31e,22,true,93.87,137
+fdad3f914ef9b31e,23,true,209.06,131
+fdad3f914ef9b31e,24,true,487.91,447
+fdad3f914ef9b31e,25,true,127.54,410
+fdad3f914ef9b31e,26,true,321.77,389
+fdad3f914ef9b31e,27,true,78.58,44
+fdad3f914ef9b31e,28,true,406.98,429
+fdad3f914ef9b31e,29,true,437.87,264
+fdad3f914ef9b31e,30,true,416.0,383
+fdad3f914ef9b31e,31,true,343.62,141
+fdad3f914ef9b31e,32,true,273.11,84
+fdad3f914ef9b31e,33,true,178.8,116
+fdad3f914ef9b31e,34,true,65.82,287
+fdad3f914ef9b31e,35,true,465.99,104
+fdad3f914ef9b31e,36,true,237.38,363
+fdad3f914ef9b31e,37,true,415.76,154
+fdad3f914ef9b31e,38,true,192.21,467
+fdad3f914ef9b31e,39,true,127.45,368
+fdad3f914ef9b31e,40,true,89.45,167
+fdad3f914ef9b31e,41,true,198.23,79
+fdad3f914ef9b31e,42,true,328.53,182
+fdad3f914ef9b31e,43,true,353.09,304
+fdad3f914ef9b31e,44,true,348.11,56
+fdad3f914ef9b31e,45,true,68.54,214