Add measurement_keys property #19767

Job	Run time
Pytest Ubuntu (3.11)	9m 28s
Misc check	6s
Pytest Ubuntu (3.12)	9m 27s
Pytest Ubuntu (3.13)	9m 13s
Lint check	50s
Packaging test	1m 37s
Doc test	1m 43s
Notebook formatting	15s
Changed files test	2m 12s
Check consistency of requirements	19s
Coverage check	18m 19s
Format check	18s
Build protos	19s
Type check	1m 46s
Shell check	9s
Isolated pytest Ubuntu	7m 57s
Pytest Windows (3.12)	8m 40s
Pytest Windows (3.11)	8m 41s
Pytest MacOS (3.13)	7m 19s
Pytest MacOS (3.12)	7m 13s
Typescript tests	43s
Pytest Windows (3.13)	8m 30s
Changed Notebooks Isolated Test against Cirq stable (partition-0)	50s
Typescript lint check	37s
Pytest MacOS (3.11)	6m 51s
Bundle file consistency	45s
Changed Notebooks Isolated Test against Cirq stable (partition-3)	53s
Changed Notebooks Isolated Test against Cirq stable (partition-2)	54s
Typescript tests coverage	35s
Changed Notebooks Isolated Test against Cirq stable (partition-1)	51s
Notebook Tests against PR	9m 39s
	2h 6m 59s

Provide feedback