Fixes three deviations from docs/specification.md in the agents session show
rich output Session Summary panel:
1. Renamed 'Session ID:' label to 'ID:' to match spec exactly.
2. Removed 'Namespace:' field which is not part of the spec.
3. Added 'Automation:' field sourced from session.metadata['automation_profile'],
defaulting to '(none)' when not set.
4. Field order now matches spec: ID → Actor → Messages → Created → Updated → Automation.
Updated features/session_cli.feature to assert the corrected field labels are
present ('ID:', 'Actor:', 'Messages:', 'Created:', 'Updated:', 'Automation:')
and that the removed fields ('Session ID:', 'Namespace:') are absent.
Added 'the session CLI output should not contain' step definition to
features/steps/session_cli_steps.py to support the new negative assertions.
ISSUES CLOSED: #3040
freemo