v0.5.0

Added

• Shared album, per event and off by default: guests can also see the others'
  approved photos, during and after the event or only once it is over. Never
  pending or hidden photos, never the others' originals.
• QR codes per table or place: each with the event's design and the place's
  name, photos sent after scanning one are tagged with it, with a filter in the
  Photos tab and a count per place in Stats.
• Photo booth: a link for a tablet on a stand, with the live camera full
  screen, a countdown and the event's frame; the photo goes straight into the
  album. Revocable, no per-guest limit.
• Blurry photos and duplicates are spotted on the server from the pixels (no
  outside service) and shown as filters in moderation; photos already in the
  album are analysed in the background.
• Invite co-organizers by email: a single-use link, valid 7 days, where they
  pick their own username and password; revocable, and shown to copy when
  email isn't set up.
• Printable album: a PDF with a cover and the photos (or the favorites), 1, 2
  or 4 per A4 page with credits, from the originals for one per page.
• Cloud export over WebDAV (Nextcloud, ownCloud, Synology, kDrive…): one
  folder per event, sent in the background with its progress, by hand or
  automatically when the event ends.
• Single sign-on with any OpenID Connect provider (Authentik, Authelia,
  Keycloak…): OIDC_ISSUER, OIDC_CLIENT_ID, OIDC_CLIENT_SECRET.
• Prometheus metrics at /api/metrics, behind METRICS_TOKEN.

Changed

• An event's settings tab: an outline that follows the page, what each section
  is for, the frame picked from previews, the save bar only when something
  changed (with Discard, and a warning before leaving), and duplicating and
  deleting laid out like the rest.

Fixed

• The live wall's mosaic and grid showed photos cropped to a square (frames
  and edges cut off): they are now shown whole, over a blurred copy that fills
  the tile.

Full Changelog: v0.4.0...v0.5.0