CLAUDE.md: the historian SDK is now owned inside HistorianGateway at
histsdk/ (the separate ~/Desktop/histsdk repo was folded in with history),
so the sister-project list no longer points at a standalone repo.
Also checks in working notes that were sitting untracked in the tree:
deferred.md (remaining deferred work snapshot), ScadaBridge-docs-fixed.md and
ScadaBridge-docs-issues.md (documentation-analysis report output).
Joseph Doherty