Add synthetic CSV DuckDB tutorial link (#414)

Co-authored-by: Alper San <[email protected]>

README.md

@@ -679,6 +679,7 @@ Community-contributed DuckDB extensions, which can be installed via `INSTALL ⟨
 - [Building duckdb-pst](https://intellekt.fyi/2026/02/03/the-data-warehouse-in-your-email-archive-teaching-duckdb-to-speak-outlook/) - How to go from 0 to a production-ready DuckDB extension for Outlook PSTs, including table functions, MAPI schema serialization, projection/statistics pushdown, concurrent planning, and late materialization.
 - [How to Query Reservoir's Hyperliquid Data](https://hydromancer.xyz/blog/exploring-reservoir) - Using DuckDB's httpfs extension and `read_parquet` to query Hyperliquid fills, candles and order book snapshots stored as Parquet in a requester-pays S3 bucket, pulling only the columns and time ranges a query needs.
 - [DuckDB Explained: When a Database on Your Laptop Beats SQLite, Polars and BigQuery](https://www.alekseialeinikov.com/en/blog/topics/data/duckdb-explained-vs-sqlite-polars-bigquery) - Reproducible benchmark of DuckDB against SQLite, pandas and Polars on 11.2 million NYC taxi trips, where it replaces a warehouse and where it does not, with notes on DuckDB 2.0.
+- [Five DuckDB recipes for market data CSV exports](https://sifting.io/blog/duckdb-market-data-csv-five-sql-recipes) - DuckDB 1.x SQL examples using a synthetic CSV to check coverage and timestamp gaps, build UTC daily bars, and calculate close returns and rolling means.
 
 ### Books