refactor: route remaining day-path bypasses through day_path()
Catches bypasses missed by the VPE bulk cleanup: ingest.py,
routes.py, sense.py, conversation.py, runner.py, sol/routes.py.
All now use day_path() from think.utils instead of manually
constructing journal/day paths. Pre-cleanup for chronicle migration.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>