f83d194002
ISCC's default error message ("The system cannot find the path
specified.") doesn't say which file failed, which made the Gitea
runner failure undebugable. Two changes:
1. Before invoking ISCC, log a one-line summary per source path the
.iss references: file count, longest path length, root. Also dump
HKLM\...\FileSystem\LongPathsEnabled so MAX_PATH issues are
immediately obvious.
2. Pass /Qp to ISCC so it prints each file as it processes; the line
right before the error tells us which source file ISCC choked on.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>