fix: Add config option to skip filepath checksum on insert

[dimitri-yatsenko]

Summary

Adds filepath_checksum_size_limit_insert config option to skip checksum computation on insert for files larger than the specified limit. This prevents transaction timeouts when inserting large files with filepath attributes in three-part make() methods.

Problem

In three-part make() methods, the transaction can expire while checksums are computed for large files with filepath fields. This causes the entire make() to fail.

Solution

Config Option	Purpose
filepath_checksum_size_limit	Skip checksum verification on fetch (existing)
filepath_checksum_size_limit_insert	Skip checksum computation on insert (new)

When checksum is skipped on insert:

• A warning is logged
• contents_hash is stored as NULL
• Existing file verification is bypassed

Usage

import datajoint as dj

# Skip checksum on insert for files > 1GB
dj.config['filepath_checksum_size_limit_insert'] = 1024 * 1024 * 1024

Or via environment variable:

export DJ_FILEPATH_CHECKSUM_SIZE_LIMIT_INSERT=1073741824

Fixes #1386

🤖 Generated with Claude Code