Merge branch 'main' into mk/merge-entities

# Conflicts:
#	.github/workflows/binaries-publish.yaml
#	.github/workflows/e2e-partial.yaml
#	.github/workflows/partial-backend.yaml
#	.github/workflows/partial-frontend.yaml
#	backend/app/api/handlers/v1/v1_ctrl_items.go
#	backend/go.mod
#	backend/go.sum
#	backend/internal/data/ent/attachment.go
#	backend/internal/data/ent/attachment/attachment.go
#	backend/internal/data/ent/attachment/where.go
#	backend/internal/data/ent/attachment_create.go
#	backend/internal/data/ent/attachment_query.go
#	backend/internal/data/ent/attachment_update.go
#	backend/internal/data/ent/migrate/schema.go
#	backend/internal/data/ent/mutation.go
#	backend/internal/data/repo/repo_item_attachments.go
#	backend/internal/data/repo/repo_items.go

backend/internal/data/migrations/postgres/20250619215101_add_thumbnails.sql

@@ -0,0 +1,14 @@
+-- +goose Up
+alter table public.attachments
+    alter column item_attachments drop not null;
+
+alter table public.attachments
+    add attachment_thumbnail uuid;
+
+alter table public.attachments
+    add constraint attachments_attachments_thumbnail
+        foreign key (attachment_thumbnail) references public.attachments (id);
+
+alter table public.attachments
+    add constraint attachments_no_self_reference
+        check (id != attachment_thumbnail);

backend/internal/data/migrations/postgres/20250625120010_add_mime_type.sql

@@ -0,0 +1,3 @@
+-- +goose Up
+ALTER TABLE public.attachments ADD COLUMN mime_type VARCHAR DEFAULT 'application/octet-stream';
+

backend/internal/data/migrations/postgres/20250629112901_fix_thumbnail_foriegn.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+alter table public.attachments
+    drop constraint attachments_attachments_thumbnail;
+
+alter table public.attachments
+    add constraint attachments_attachments_thumbnail
+        foreign key (attachment_thumbnail) references public.attachments
+    on delete set null;