Joseph Doherty
099f253321
m-1: a poll that captured a reader a rebind then disposed retries once on the current reader; with no newer reader the typed SqlPollReaderDisposedException is marked classified, so HandlePollError no longer degrades for it. Groups report a disposed reader as a sentinel so WhenAll surfaces the typed exception, not a bare cancel. m-2: TryAddRef refuses new groups once Dispose ran, matching the doc comment. m-4: a rebind / tag-table failure in InitializeAsync now writes Faulted with a sanitized reason (generation-checked) and host Stopped instead of latching Initializing with no LastError. m-6: SecurityClass-as-descriptor is documented at the Sql site (Commons field is a follow-up). m-7: a position-less JsonException renders '?' instead of blanks. Refs #744 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT