Remote sessions repeat some rows after compaction; bridge handles unverified Slack turns

What

Compaction is when Claude Code shortens a long conversation by summarising older parts so it fits in the model's memory. This release adds a way to keep certain rows of a remote session present after that happens:

• The remote input/output layer gets a repeatAfterCompaction setter.
• When a compaction event is queued with no session_agent_id, the client appends extra rows from rowsRepeatedAfterCompaction in the same batch, each with a fresh uuid. Before, only the original events were sent.
• Separately, the bridge's handler for incoming messages now calls a function for messages that are not slash commands and lack verifiedSlackHumanTurn.

Why

Rows that a compaction would otherwise drop can stay in the stored session. These are internals of remote sessions, and what the Slack-turn handling does in practice is not described.