v2.8.0

Changelog

• 6158e1d: feat: dci commands --search finds the command for a task in plain words (@spark2ignite)
• 32d8d1d: fix: dci ai children refuse -v/--rsh-verbose and -s/--rsh-server so credentials never reach the model (@claude)
• 8b2534e: fix: help flag visibility covers the beta results command, flag errors, and multi-argument commands (@spark2ignite)
• 0ec2a1e: fix: help lists only applicable flags, groups question commands, states exit codes (@spark2ignite)
• 4230197: fix: render help without credentials, and report a failed login as AUTHENTICATION_REQUIRED (@spark2ignite)