SYNTHETIC ACCEPTANCE FIXTURE

Matched synthetic query/point/device/window, scan depth 20:
Observation 1: exact rank 2
Observation 2: not found within depth 20
Observation 3: missing scan
No real office, competitor or coordinates are represented.

EXPECTED RESULT
There are 2 valid observations and 1 missing observation. Top-three coverage among valid observations is 1/2 = 50%. Not-found is not exact rank 21, and missing scan must not become a ranking observation.

This is a test specification, not output from a tested integration.