Now I need to make sure `CellItemPair` is defined before `ParsedData`. Let me check:


1800:struct CellItemPair { uint64_t cell_id; uint32_t item_id; };


It's at line 1800 but ParsedData is at line 249. Need to move the struct definition earlier.


Edit

// Sorted cell-item pair for direct entry writing (avoids hash map)
struct CellItemPair { uint64_t cell_id; uint32_t item_id; };

struct ParsedData {