v0.1.6

Added

• cn doctor command — checks project health and data integrity (config, JSONL integrity, schema validation, inheritance chains, emit staleness, stale locks, version sync) with --fix and --verbose flags
• cn upgrade command — upgrades canopy to the latest npm version (--check for dry-run)
• Global --quiet / -q flag — suppresses non-error output across all commands
• Global --verbose flag — enables extra diagnostic output
• Rich --version --json output — returns name, version, runtime, and platform metadata
• setQuiet() function in output.ts for programmatic quiet mode control