File size: 4932118

=== COLUMNAR ===
Parsed: 102 entries
First offset: 77
INVALID: TileID=3376443, offset=351777249486534, length=15488484252
Valid: NO

=== INTERLEAVED ===
Parsed: 102 entries
First offset: 16338
INVALID: TileID=213, offset=20936700617, length=171115762
Valid: NO

=== DETECTION LOGIC ===
colValid: false
intValid: false
Result: interleaved (neither valid)

Actual detect_directory_format() result: columnar