Adds the @pro ScanImport contract (ProScanImportProps/ProScanImport) and
a null community stub, and slots a third SCAN-BASED card into
CreateTopologyWizard, gated on the pro panel being present so it
tree-shakes out of the community build. The scan->topology importer
itself ships in decnet/pro v1.2.0. CHANGELOG updated under [1.2.0].
Prefork worker consolidation (decnet.prefork + decnet fleet heavy),
ATT&CK 19.1 relocation to decnet/data/, and removal of the 10 per-worker
unit templates superseded by the supervisor groups + heavy fleet.
Bundle pointer moved from repo root to decnet/data/ (with LICENSE.txt),
gitignored + fetched on demand (51MB, MITRE-licensed). Version pin bumped
19.0->19.1 with the new sha256; license unchanged. All _REPO_BUNDLE test
constants repointed. Fixes test-web failures after the repo-root bundle
was deleted.