failed to merge voxels - error: 500 Internal Server Error

Validation Report

#	Plan Item	Status	Evidence
1	Change `CAST(FLOOR(pv.x / {voxel_size}) AS INTEGER)` to `AS BIGINT` for x column	PASS	`services/voxel/lambda/merge_voxel.py`: line 73 in diff shows `AS INTEGER` replaced with `AS BIGINT` for the x cast expression
2	Change `CAST(FLOOR(pv.y / {voxel_size}) AS INTEGER)` to `AS BIGINT` for y column	PASS	`services/voxel/lambda/merge_voxel.py`: line 73 in diff shows `AS INTEGER` replaced with `AS BIGINT` for the y cast expression

#	Criterion	Status	Evidence
1	`merge_voxel.py`에서 `AS INTEGER`가 0건 (grep 결과)	PASS	Grep for `AS INTEGER` in `services/voxel/lambda/merge_voxel.py` returns 0 matches
2	`merge_voxel.py`에서 `AS BIGINT`가 2건 (x, y)	PASS	Grep for `AS BIGINT` in `services/voxel/lambda/merge_voxel.py` returns exactly 1 line containing 2 occurrences (x and y casts on line 73)
3	다른 코드 변경 없음 (최소 변경 원칙)	PASS	`git diff` shows only 2 files changed: (1) `services/voxel/lambda/merge_voxel.py` line 73 -- the planned single-line change, and (2) `.gitignore` -- addition of `services/voxel/lambda/__pycache__/` to ignore list. The `.gitignore` addition is a cleanup of an accidentally committed `__pycache__` directory (confirmed by commit `c2eca22` message). No functional code beyond the plan was modified.

No blocking issues found.

The diff includes a .gitignore addition (services/voxel/lambda/__pycache__/) and a corresponding removal of a previously committed __pycache__/merge_voxel.cpython-39.pyc binary file. This is not part of the plan but is a reasonable housekeeping change (preventing bytecode from being tracked). It does not affect functional behavior.
The fix is a single-line change on line 73 of merge_voxel.py, replacing two AS INTEGER casts with AS BIGINT to prevent 32-bit integer overflow in Athena SQL queries. The change is minimal and precisely targeted.