Forage

This reshapes Hive around projects as the top-level thing the instance tracks, with domains as reusable classification tags that can belong to one or more projects.

Spec comment authors can now delete their own comments from the spec page.

This configures Sentry error reporting for Hive:

• Update OpenGraph image paths to include a .jpg extension while preserving existing hash validation behavior.

• Refresh open spec pages when the async revision summary worker stores an agent-written summary.

Reviewers told me the Specs page felt like a queue I had no way to triage from a distance. The sidebar link was hard-coded to ?filter_status_val=draft, hiding everything else, an…

• Reuses the standard forage page header structure on item detail pages so GitHub issue details align with the rest of the forage UI.

• Add runtime Slack notification settings per connected workspace from /ops/slack, including persisted channel IDs and event selection.

Adds a new drops surface to Hive: a dashboard for shipped updates ingested from GitHub Releases and operator-registered RSS/Atom changelog feeds.

Stacked on top of #53 — review/merge that first. This branch targets feat/release-update-sources-rss-feeds so the diff is just the project layer.