feat(photos): full EXIF metadata extraction, backfill and info panel

- backend: switch EXIF parser to dsoprea/go-exif/v3 (all recognised tags, numeric normalization); store in photos.exif jsonb (migration 000003); add storage.Get and cmd/backfill-exif to backfill existing photos from S3 originals
- frontend: info panel renders all EXIF attributes with RU labels, enum translation and units (1/N, f/N, mm, EV); service tags hidden
- viewer: remove make-cover action (cover managed from panel only), icon-only download
- openspec: sync lightroom-workspace-ui artifacts (EXIF, cover-from-panel) and add plan for configurable info attributes/labels stored in user profile

backend/go.mod

@@ -9,13 +9,13 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/s3 v1.114.3
 	github.com/aws/smithy-go v1.28.5
 	github.com/disintegration/imaging v1.6.2
+	github.com/dsoprea/go-exif/v3 v3.0.1
 	github.com/gen2brain/webp v0.6.4
 	github.com/gin-gonic/gin v1.12.0
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	github.com/golang-migrate/migrate/v4 v4.20.1
 	github.com/google/uuid v1.6.0
 	github.com/jackc/pgx/v5 v5.11.0
-	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd
 	golang.org/x/crypto v0.58.0
 )
 
@@ -37,14 +37,18 @@ require (
 	github.com/bytedance/sonic v1.15.0 // indirect
 	github.com/bytedance/sonic/loader v0.5.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd // indirect
+	github.com/dsoprea/go-utility/v2 v2.0.0-20221003172846-a3e1774ef349 // indirect
 	github.com/ebitengine/purego v0.10.1 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
 	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-errors/errors v1.4.2 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.30.1 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/goccy/go-yaml v1.19.2 // indirect
+	github.com/golang/geo v0.0.0-20210211234256-740aa86cb551 // indirect
 	github.com/jackc/pgerrcode v0.0.0-20220416144525-469b46aa5efa // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
@@ -68,4 +72,5 @@ require (
 	golang.org/x/sys v0.49.0 // indirect
 	golang.org/x/text v0.43.0 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )