Make --confirm default for advance send_input

[rysweet]

Make --confirm the default for send_input actions in fleet advance. Add --force flag to skip confirmation. Restart always requires confirmation.

Files to modify:

• src/amplihack/fleet/_cli_session_ops.py

Requirements:

1. Change advance command so send_input actions prompt for confirmation by default
2. Add --force flag that skips the confirmation prompt
3. Restart actions always require confirmation (cannot be skipped with --force)
4. Update CLI argument parser accordingly
5. Update help text to reflect new defaults
6. All 918+ fleet tests must pass
7. Commit changes on this branch