IDriver.DriverInstanceId is declared as string in Core.Abstractions; keeping
the pipeline key as Guid meant every call site would need .ToString() / Guid.Parse
at the boundary. Switching the Resilience types to string removes that friction
and lets OtOpcUaServer pass driver.DriverInstanceId directly to the builder in
the upcoming server-dispatch wiring PR.
- DriverResiliencePipelineBuilder.GetOrCreate + Invalidate + PipelineKey
- CapabilityInvoker.ctor + _driverInstanceId field
Tests: all 48 Core.Tests still pass. The Invalidate test's keepId / dropId now
use distinct "drv-keep" / "drv-drop" literals (previously both were distinct
Guid.NewGuid() values, which the sed-driven refactor had collapsed to the same
literal — caught pre-commit).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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