hpnc queue

Manage the night queue.

hpnc queue add

Add a story to the night queue.

hpnc queue add stories/my-task.md

What it does

1. Validates the file exists and is .md
2. Parses YAML frontmatter
3. Checks for duplicates (by file path)
4. Appends to _hpnc/night-queue.yaml
5. Shows confirmation with metadata summary

Duplicate detection

Adding the same story twice is rejected with a warning.