Add raw and processed financial datasets

processed/data_quality_report.csv

@@ -0,0 +1,16 @@
+asset,stage,total,nan,pct_nan
+vnindex,before_fill,2847,0,0.0
+btc,before_fill,2847,16,0.56
+oil,before_fill,2847,103,3.62
+gold,before_fill,2847,104,3.65
+sp500,before_fill,2847,103,3.62
+sse,before_fill,2847,140,4.92
+vix,before_fill,2847,103,3.62
+vnindex,after_fill,2831,0,0.0
+btc,after_fill,2831,0,0.0
+oil,after_fill,2831,0,0.0
+gold,after_fill,2831,0,0.0
+sp500,after_fill,2831,0,0.0
+sse,after_fill,2831,0,0.0
+vix,after_fill,2831,0,0.0
+ALL,rows_dropped,2847,16,0.56

raw/crawl_summary.csv

@@ -0,0 +1,7 @@
+name,ticker,records,from,to,file
+bitcoin,BTC-USD,4149,2015-01-01,2026-05-11,./bitcoin_2015_2026.csv
+oil_wti,CL=F,2855,2015-01-02,2026-05-11,./oil_wti_2015_2026.csv
+gold,GC=F,2854,2015-01-02,2026-05-11,./gold_2015_2026.csv
+sp500,^GSPC,2855,2015-01-02,2026-05-11,./sp500_2015_2026.csv
+sse,000001.SS,2753,2015-01-05,2026-05-11,./sse_2015_2026.csv
+vix,^VIX,2855,2015-01-02,2026-05-11,./vix_2015_2026.csv