feat: add SMI as a Christmas special and update dataset documentation

.gitignore

@@ -22,6 +22,7 @@ thumbs.db
 *config.yml
 validated_symbols.txt
 directory-structure.txt
+commitmsg.txt
 README.preview.md
 .DS_Store 
 **pycache**/ 

README.md

@@ -106,7 +106,7 @@ The dataset provides OHLC and volume data at multiple time resolutions and is de
 Unlike many freely available data sources, TroveLedger emphasizes **continuity over time**, especially for minute-level data.
 
 ### Scale & Granularity
-- Total: Over 32 million rows across all symbols and resolutions (growing rapidly)
+- Total: Over 40 million rows across all symbols and resolutions (growing rapidly)
 - Per symbol: Varies significantly – from <1,000 rows (young stocks, daily) to >500,000 rows (established stocks, minute-resolution)
 - Ideal for both focused single-symbol training and large-scale multi-market models
 

commitmsg.txt

@@ -1,5 +0,0 @@
-Add SMI Christmas special and update Growing Treasury
-
-Introduces the Swiss Market Index (SMI) as a Christmas special, updates the
-Latest Dataset Update section, extends the Recent Index Additions table,
-and adds the corresponding Growing Treasury entry with artwork and symbol list.