[tobias-tengler]

Apollo representations decode __typename and resolve its schema type even when the completed object already carries its concrete type.

This PR reuses the existing type and name when the actual type name matches the completed object’s concrete selection type. Missing, escaped and opaque type handling and the imported-snapshot fallback retain their contracts.

Method	Version	Mean	Ratio	Allocated	Alloc Ratio
Concrete representations, 16 objects	main	4.806 us	1.00	1272 B	1.00
Concrete representations, 16 objects	PR	4.553 us	0.95	1272 B	1.00
Mixed abstract representations, 16 objects	main	14.976 us	1.00	1784.5 B	1.00
Mixed abstract representations, 16 objects	PR	13.837 us	0.92	1272 B	0.71
Nested abstract representations, 16 objects	main	14.643 us	1.00	1785 B	1.00
Nested abstract representations, 16 objects	PR	13.706 us	0.94	1272 B	0.71
Imported snapshot representations, 16 objects	main	3.064 us	1.00	1032 B	1.00
Imported snapshot representations, 16 objects	PR	2.935 us	0.96	1032 B	1.00

[github-actions]

Patch coverage

100.0% of changed lines covered (10/10)

File	Covered	Changed	Patch %
…/Execution/Results/FetchResultStore.RepresentationValue.cs	10	10	100.0% 🟢

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Project coverage: 59.0% (311511/527765 lines)

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