V48 (specification-implementation): Extract SDIVF base into packages/… #1357

Job	Run time
Validate GitHub Actions workflows	16s
Lint, Type-Check & Build	1m 1s
CodeQL Analysis	0s
Super Linter (misc files)	-1s
Unit & Integration Tests (mocks)	-1s
E2E, Visual & DB Tests	0s
	1m 15s

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