ಡ್ರಿಲ್ ಹೋಲ್ CSV ಕ್ಲೀನರ್

# collar.csv
hole_id,x,y,z,total_depth,project
DH-001,500000,6200000,1250,305,North Ridge
DH-002,500120,6200120,1242,,South Ridge
DH-003,500240,6200250,1238,180,South Ridge

# survey.csv
hole_id,depth,azimuth,dip
DH-001,0,90,-60
DH-001,50,92,-58
DH-001,45,94,-57
DH-002,0,110,-65
DH-003,0,180,-70
DH-003,30,181,-69

# assay.csv
hole_id,from,to,au_gpt,cu_pct
DH-001,0,10,0.12,0.18
DH-001,10,20,0.19,0.22
DH-001,18,30,0.21,0.25
DH-002,0,15,0.05,0.09
DH-003,40,30,0.08,0.11

# lithology.csv
hole_id,from,to,lithology,code
DH-001,0,25,Oxidized,OX
DH-001,25,55,Fresh,FR
DH-002,10,40,Andesite,AN
DH-003,0,20,Basalt,BA

Errors: 4
Warnings: 2
Fixable: 3
- DH-001 survey depth reversal at 45 m
- DH-001 assay overlap at 18-20 m
- DH-002 collar is missing total depth
- DH-003 lithology extends past collar depth