Add Example 2 source and SDTM data files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tnagamine

examples/example2/data/sdtm/AE.csv

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+USUBJID,AESEQ,AETERM,AEDECOD,AELLTCD,AESER,AEREL,AESTDTC	
+002,1,NA,Hepatic enzyme increased,10060795,N,N,11/6/2025

examples/example2/data/sdtm/LB.csv

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+USUBJID,LBSEQ,LBTESTCD,LBTEST,LBDTC,LBORRES,LBORRESU,LBSTRES,LBSTRESU,LBSTNRLO,LBSTNRHI,LBNRIND
+001,1,ALT,Alanine Aminotransferase,2/10/2024,0.35,µkat/L,21, U/L,7,55,NORMAL
+001,2,AST,Aspartate Aminotransferase,2/10/2024,0.58,µkat/L,35, U/L,8,48,NORMAL
+001,3,ALP,Alkaline Phosphatase,2/10/2024,0.80,µkat/L,48, U/L,40,129,NORMAL
+001,4,ALT,Alanine Aminotransferase,3/25/2025,0.53,µkat/L,32, U/L,7,55,NORMAL
+001,5,AST,Aspartate Aminotransferase,3/25/2025,0.72,µkat/L,43, U/L,8,48,NORMAL
+001,6,ALP,Alkaline Phosphatase,3/25/2025,1.79,µkat/L,107, U/L,40,129,NORMAL
+002,1,ALT,Alanine Aminotransferase,10/25/2024,0.87,µkat/L,52, U/L,7,55,NORMAL
+002,2,AST,Aspartate Aminotransferase,10/25/2024,0.78,µkat/L,47, U/L,8,48,NORMAL
+002,3,ALP,Alkaline Phosphatase,10/25/2024,2.14,µkat/L,128, U/L,40,129,NORMAL
+002,4,ALT,Alanine Aminotransferase,11/6/2025,1.00,µkat/L,60, U/L,7,55,HIGH
+002,5,AST,Aspartate Aminotransferase,11/6/2025,0.82,µkat/L,49, U/L,8,48,HIGH
+002,6,ALP,Alkaline Phosphatase,11/6/2025,2.19,µkat/L,131, U/L,40,129,HIGH

examples/example2/data/source/LabResults.csv

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+PATID,LOINC Code,Lab Test,Visit Date,Lab Result
+383641,1742-6,Alanine Aminotransferase,2/10/2024,0.3507 µkat/L
+383641,1920-8,Aspartate Aminotransferase,2/10/2024,0.5845 µkat/L
+383641,1775-6,Alkaline Phosphatase,2/10/2024,0.8016 µkat/L
+383641,1742-6,Alanine Aminotransferase,3/25/2025,0.5344 µkat/L
+383641,1920-8,Aspartate Aminotransferase,3/25/2025,0.7181 µkat/L
+383641,1775-6,Alkaline Phosphatase,3/25/2025,1.7869 µkat/L
+342832,1742-6,Alanine Aminotransferase,10/25/2024,0.8684 µkat/L
+342832,1920-8,Aspartate Aminotransferase,10/25/2024,0.7849 µkat/L
+342832,1775-6,Alkaline Phosphatase,10/25/2024,2.1376 µkat/L
+342832,1742-6,Alanine Aminotransferase,11/6/2025,1.002 µkat/L
+342832,1920-8,Aspartate Aminotransferase,11/6/2025,0.8183 µkat/L
+342832,1775-6,Alkaline Phosphatase,11/6/2025,2.1877 µkat/L