kdev: batch git subprocesses — one ls-files and one blame per file

2026-05-12T15:49:38Z

Previously CreateExtractor ran git ls-files per file, and Extract ran git blame -L per matching line. Now ls-files runs once at factory construction to build a tracked-file set, and blame runs once per file at extractor creation with all line timestamps cached. Co-Authored-By: Claude Sonnet 4.6

kagamigo/cmd/kdev/record_extractor_test.go, branch main

kdev: batch git subprocesses — one ls-files and one blame per file