Add --dry-run flag to sol dream
Shows what agents would be spawned without executing anything.
Standalone functions call existing utilities (get_muse_configs,
get_enabled_facets, get_active_facets, etc.) rather than threading
a flag through the execution functions. Supports all modes: daily,
segment, --segments, --activity, and --flush.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>