76b772ab41
Without this, `-DnestsInterop=true` on the Gradle command line was only set on the Gradle JVM, not on the test executor JVM that NostrNestsHarness.isEnabled() reads via System.getProperty. Result: every interop test silently skipped no matter how the run was invoked. Also forwards `nestsInteropRev` (used by the harness to pin the nostrnests revision in the cache). Verified with `./gradlew :nestsClient:jvmTest --tests NostrNestsAuthInteropTest -DnestsInterop=true` that the harness now actually runs (the run only fails inside the test because the sandbox blocks outbound traffic to GHCR / Docker Hub — both registries return 503 at the auth-token endpoint, so we can't pull strfry / build moq images here. On a network-enabled host the harness will bring up the stack normally).