adds ~60 new tests across RuntimeKey parsing, EnvVarKeyDelivery, the
legacy and m2pack formats, ReleaseFormatFactory dispatch, manifest
loader tolerance of unknown top-level fields, orchestrator wiring and
the ClientAppliedReporter (disabled-by-default, success, 5xx, timeout,
connection refused). The telemetry tests spin up an in-process
HttpListener helper — no new NuGet dependency.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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