[FSTORE-1522] [APPEND] Fix hsml deduplication #801

Job	Run time
Lint and Stylecheck	8s
Unit Tests (No Optional Dependencies)	2m 29s
Unit Tests (Pandas 1.x)	2m 12s
Unit Tests (Local TZ)	3m 7s
Unit Tests (3.8)	2m 58s
Unit Tests (Typechecked)	4m 12s
Unit Tests (3.9)	3m 4s
Unit Tests (Windows)	10m 21s
Unit Tests (3.10)	3m 11s
Unit Tests (Windows) (Local TZ)	10m 32s
	42m 14s

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