feat: VERBOSE=true enables DEBUG-level console output

The log file already captures DEBUG unconditionally. This env var wires
the same to the Rich console handler for troubleshooting without needing
to read the log file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

compose.yml

@@ -12,6 +12,7 @@ services:
       # Auto mode is active by default when no TTY is present (Docker/cron).
       # Set AUTO_MODE=true to force auto mode in an interactive terminal.
       # To run interactively: docker exec -it winnow winnow
+      # - VERBOSE=true                # Enable DEBUG-level console output
       # TRAINING_MODE: face = upload to Frigate face recognition API
       #                object = save crops to output dir for manual Frigate placement
       - TRAINING_MODE=face