bench(csharp): add store_sales SF10 benchmark query

[msrathore-db]

Summary

• Add large-scale benchmark: SELECT * FROM main.tpcds_sf10_delta.store_sales (28.8M rows, 23 columns)
• For JDBC vs ADBC performance comparison

Test plan

• Benchmark workflow runs successfully

This pull request was AI-assisted by Isaac.

[github-actions]

📊 CloudFetch Benchmark Results

.NET 8.0

Query	Mean (ms)	Peak Memory (MB)	Allocated Memory (MB)	Gen2	Rows	Cols
catalog_sales	2400.66	287.35	287.35	48	1441548	34
customer	893.71	37.15	37.15	2	100000	18
inventory	6939.22	245.97	245.97	79	11745000	5
sales_with_timestamps	3362.22	126.56	126.56	41	2880404	13
store_sales_numeric	3082.00	336.89	336.89	65	2880404	16
store_sales_sf10	21416.79	3451.25	3451.25	286	28800501	23
web_sales	1608.03	162.57	162.57	37	719384	34
wide_sales_analysis	9426.18	1156.37	1156.37	93	2880404	54

.NET Framework 4.7.2

Query	Mean (ms)	Peak Memory (MB)	Allocated Memory (MB)	Gen2	Rows	Cols
catalog_sales	4877.78	528.83	528.83	3	1441548	34
customer	1255.15	38.80	38.80	0	100000	18
inventory	45565.39	264.09	264.09	2	11745000	5
sales_with_timestamps	13550.77	148.14	148.14	2	2880404	13
store_sales_numeric	12827.33	401.59	401.59	2	2880404	16
store_sales_sf10	107832.55	3785.75	3785.75	40	28800501	23
web_sales	3791.58	400.75	400.75	3	719384	34
wide_sales_analysis	15088.97	2918.37	2918.37	22	2880404	54

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🟢 Improvement | 🔴 Regression | ⚪ No change

Format: current_value (baseline) diff%

• Baseline: Latest successful run on main branch

Metrics:

• Mean: Execution time in milliseconds
• Peak Memory: Total bytes allocated during operation in MB
• Allocated Memory: Bytes allocated per operation in MB
• Gen2: Number of Gen2 garbage collections