docs: update changelog for v0.25.1

[augmentmoogi]

Update release notes for v0.25.1.

• Document new CLI capabilities for cloud trigger management, non-interactive login, cloud environment defaults, transcript persistence, and the auggie cosmos alias.
• Summarize usability and reliability improvements across VFS syncing, VM connection retries, image attachment handling, environment defaults, and cloud session listing.
• Capture bug fixes for TUI flicker, daemon/session recovery, rebuild argument handling, registry MCP toggles, and queued request retry behavior.

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[augmentmoogi]

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