Bloks 2.9.0

A failed turn is asked again and then handed to your backup engine, agents remember your standing instructions, and Telegram sends just the answer.

• Failed turns recover on their own. A turn that fails for any reason is asked again once, and then handed to the agent's backup engine with the conversation so far. A turn a provider declined on safety grounds is asked again in a new session, so the agent is no longer stuck refusing every message after it. When the backup has answered, the agent goes back to its own engine in its own session after a while, told what it missed. Each turn after a failure is told what failed, so the agent can tell you. Thanks @rpavlovs (#284)
• Your standing instructions survive a long conversation. When older messages are summarised to make room, the summary now keeps what you told the agent to use or avoid, in your words, and no longer drops what you said late in a long stretch. Thanks @nattapongcoin-source (#277)
• Telegram sends the final answer, and short notes as it works. The reply is the agent's last word instead of everything it wrote joined together, notes arrive as silent messages and are cleared when the answer comes, and a turn that ends without a reply sends why. Thanks @rpavlovs (#285)
• Agents can take back a message still waiting for another agent with bloks take-back, when a correction comes too late. Thanks @rpavlovs (#283)
• Stopping a Codex turn no longer reports an error. Thanks @rpavlovs (#286)