fix(runtime): unregister shutdown activations from directory#10206
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Directory-backed activations deactivated during silo shutdown now unregister once deactivation completes, preventing lookups from resolving to stale activation targets after the catalog target has been removed. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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This was referenced Jun 14, 2026
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During graceful silo shutdown, directory-backed activations could remain registered after their catalog target had been removed. Calls resolving through that stale directory entry could be forwarded to a terminating silo, fail to create a local activation, exhaust forwarding, and surface as transient RPC failures during shutdown.
This unregisters directory-backed activations once shutdown deactivation completes, while preserving the existing migration and directory-failure exceptions.
Microsoft Reviewers: Open in CodeFlow