[FC-0099] docs: add adr 0008 compatibility scheme with the current system #175

Job	Run time
tests (ubuntu-latest, 3.11, quality)	31s
tests (ubuntu-latest, 3.11, pii_check)	23s
tests (ubuntu-latest, 3.11, django42)	26s
tests (ubuntu-latest, 3.12, docs)	44s
tests (ubuntu-latest, 3.11, docs)	44s
tests (ubuntu-latest, 3.12, quality)	35s
tests (ubuntu-latest, 3.12, pii_check)	36s
tests (ubuntu-latest, 3.11, django52)	36s
tests (ubuntu-latest, 3.12, django42)	33s
tests (ubuntu-latest, 3.12, django52)	29s
	5m 37s

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