v0.5.4

Added

• feat: surface suggestion_source in exports — New suggestion_source column in data export reflects backend provenance (network / search:api / grok:ai) so you can tell which venue produced each suggestion. Existing source content-type column is unchanged.
• feat: move skill content to SKILL.md at repo root — Skill now ships as a top-level SKILL.md for easier discovery.

Changed

• revert: drop sonar stats command (underwhelming) — Removed the previously-added sonar stats command; terminal plots didn't add enough value over existing views.