graph: Fix immutable entity memoization bypass in append_row() (#6083) #10003

Job	Run time
Subgraph Runner integration tests	3m 39s
Run integration tests	6m 19s
Run unit tests	10m 17s
Clippy linting	1m 40s
Check rustfmt style	8s
Build in release mode	2m 15s
	24m 18s

Provide feedback