PHLEGM v8 - Checkpoint 18 - Developer Distribution Archive Resolver

Root cause:
  Checkpoint 17 ZIP contents started at PHLEGM v8/, omitting the required
  Developer Distribution carrier directory. The external bootstrap requires
  <carrier>/PHLEGM v8/tools/Install-and-Compile.json. It rejected 17 and
  silently selected an older valid ZIP if one was present.

Naming:
  -17- is permitted inside the descriptive comment of the ZIP filename.
  Windows duplicate-download suffixes such as (1) are supported by the
  installer archive-name matcher; comments and duplicate suffixes do not
  appear in the carrier folder name.

Correct archive root:
  PHLEGM-v8-Developer-Distribution-2026-1007-1855-5105/PHLEGM v8/

Expected external bootstrap:
  Place the Developer Distribution ZIP and three bootstrap launchers together.
  The bootstrap now refuses to fall back to an older ZIP when the newest ZIP
  has an invalid root/manifest. Use -ArchivePath to explicitly select another.

Previous Checkpoint 17 non-destructive CFG clone fix is preserved.
Tests: structural / manifest / name recognition / CRC32 / regression only.
Native PowerShell compiler and end-user executable verification pending.
