Inspect the original hot reload demo baseline

Point mdv at the retained runtime copy. Each edit replaces the build output, so that path no longer identifies generation zero. Verified two scripted generations with full mdv inspection, both without runtime apply and with MetadataUpdater.ApplyUpdate. Runtime counters advanced from 1 to 3.
NatElkins · Jul 17, 2026 · Jul 17, 2026 · Jul 17, 2026 · Jul 17, 2026 · Jul 17, 2026
commit 74ec9f2c32adaa78a1cf1876fda67d2eed69b061
@@ -213,7 +213,8 @@ module HotReloadSession =
                                   HotReloadSession = hotReloadSession
                                   ProjectOptions = projectOptions
                                   SourcePath = sourcePath
-                                  BaselineDllPath = baselineDllPath
+                                  // mdv needs the original bytes because each edit overwrites the build output.
+                                  BaselineDllPath = runtimeDllPath
                                   RuntimeDllPath = runtimeDllPath
                                   RuntimeAssembly = runtimeAssembly
                                   LoadContext = loadContext