Clean-break rename of the background-analysis pipeline. No aliases, no compat shims: `sol dream` is gone, `think.dream` is unimportable. - Subcommand `sol dream` → `sol think` - Module `think/dream.py` → `think/thinking.py` (asymmetric by design: verb is `think`, module noun is `thinking`, class is `ThinkingJSONLWriter`) - Callosum tract `"dream"` → `"think"` - Health sidecar filenames drop `_dream`: `{ref}_{mode}.jsonl` and `{ref}_{mode}.log` (no `_think` replacement) - `apps/entities/events.py` dead `dream.generators_completed` listener removed (handler subscribed to an event the pipeline never emitted) Pre-rename journal logs under `journal/**/*_dream.{log,jsonl}` are left untouched as historical artifacts (accepted history blackout). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>