A gateway platform marks a bot sender with its raw user id and a bot flag, never a `bot:` id.
`resolve_author_peer_id` treated that author as a human, so `pinUserPeer` collapsed a bot onto
`peerName` and an unresolved peer opened the a2a session under the human's peer. The resolver now
takes `is_bot` and gives every bot its own peer. `sync_turn` skips the turn when no peer resolves
or when the peer equals this agent's `aiPeer`.
The a2a session key carries an eight-character digest of the author id, so two ids that sanitize
alike stay in separate sessions. During a bot-authored turn `honcho_conclude` and `honcho_profile`
refuse writes and the built-in memory mirror is skipped, because conclusions and cards describe
the human. The README paragraph on bot DMs now matches the code.
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