Add `--verbose` flag to more CLI commands

[KD-K2N2]

Description

The cortex doctor command has a --verbose flag, but most other commands don't. Add verbose output to key commands.

Commands to add --verbose:

• cortex status --verbose — show sync details, daemon PID, uptime
• cortex show --verbose — show full memory metadata (id, reason, confidence, expires_at)
• cortex sync status --verbose — show queue contents, conflict details
• cortex search --verbose — show relevance scores

Good first issue

Pattern already exists in doctor. Just add the flag and extra output lines.