feat(drive): remove all owner_id from {File,Folder}Dto

frontend/src/routes/favorites/+page.svelte

@@ -40,11 +40,9 @@
 	const entries = $derived(
 		raw.map((it): ResourceEntry => {
 			const isFile = it.resource_type === 'file';
-			// §14 provenance — prefer `created_by` (who put the item
-			// into the system) over the deprecated `owner_id`. Fall
-			// back to `owner_id` for pre-D7 rows whose `created_by`
-			// column wasn't backfilled.
-			const ownerId = it.resource.created_by ?? it.resource.owner_id ?? null;
+			// §14 provenance: `created_by` names who put the item into
+			// the system (Files browser / Favorites / Shared semantic).
+			const ownerId = it.resource.created_by ?? null;
 			return {
 				id: it.resource.id,
 				name: it.resource.name,
@@ -110,7 +108,7 @@
 			});
 			raw = reset ? page.items : [...raw, ...page.items];
 			cursor = page.next_cursor;
-			void owners.resolve(page.items.map((i) => i.resource.created_by ?? i.resource.owner_id));
+			void owners.resolve(page.items.map((i) => i.resource.created_by));
 		} catch (e) {
 			console.error('favorites: load error', e);
 			error = t('errors_loadFailed', 'Failed to load items');

frontend/src/routes/favorites/page.test.ts

@@ -41,7 +41,6 @@ function withOneFile() {
 					mime_type: 'image/png',
 					modified_at: 0,
 					name: 'photo.png',
-					owner_id: 'me',
 					created_by: 'me',
 					updated_by: 'me',
 					folder_id: 'root',

frontend/src/routes/files/[...path]/+page.svelte

@@ -1798,7 +1798,7 @@
 			<span class="grid-meta__date">{relativeTimeAgo(folder.modified_at)}</span>
 		</div>
 		<div class="owner-cell">
-			{ownerLabel(folder.created_by ?? folder.owner_id, session.user?.id ?? null)}
+			{ownerLabel(folder.created_by, session.user?.id ?? null)}
 		</div>
 		<div class="type-cell">{t('files.file_types.folder', 'Folder')}</div>
 		<div class="size-cell">—</div>
@@ -1930,7 +1930,7 @@
 			{#if file.size != null}<span class="grid-meta__size">{formatBytes(file.size)}</span>{/if}
 		</div>
 		<div class="owner-cell">
-			{ownerLabel(file.created_by ?? file.owner_id, session.user?.id ?? null)}
+			{ownerLabel(file.created_by, session.user?.id ?? null)}
 		</div>
 		<div class="type-cell">{typeLabel(file.category)}</div>
 		<div class="size-cell">{file.size != null ? formatBytes(file.size) : ''}</div>

frontend/src/routes/files/page.test.ts

@@ -90,7 +90,6 @@ function fileItem(id: string, name: string) {
 		mime_type: 'text/plain',
 		modified_at: 0,
 		name,
-		owner_id: 'me',
 		created_by: 'me',
 		updated_by: 'me',
 		folder_id: 'home',
@@ -112,7 +111,6 @@ function folderItem(id: string, name: string) {
 		is_root: false,
 		modified_at: 0,
 		name,
-		owner_id: 'me',
 		created_by: 'me',
 		updated_by: 'me',
 		parent_id: 'home',

frontend/src/routes/photos/page.test.ts

@@ -34,7 +34,6 @@ function photo(id: string) {
 		mime_type: 'image/jpeg',
 		modified_at: 0,
 		name: id + '.jpg',
-		owner_id: 'me',
 		created_by: 'me',
 		updated_by: 'me',
 		folder_id: 'home',

frontend/src/routes/recent/+page.svelte

@@ -42,11 +42,10 @@
 	const entries = $derived(
 		raw.map((it): ResourceEntry => {
 			const isFile = it.resource_type === 'file';
-			// §14 provenance — Recent's mental model is "who touched
-			// this recently", so `updated_by` (the last mutator) is
-			// preferred over `created_by` (who put it in). Fall back
-			// to `owner_id` for pre-D7 rows with no provenance.
-			const ownerId = it.resource.updated_by ?? it.resource.owner_id ?? null;
+			// §14 provenance: Recent's mental model is "who touched this
+			// recently", so `updated_by` (the last mutator) is the right
+			// signal — distinct from Favorites/Files which use `created_by`.
+			const ownerId = it.resource.updated_by ?? null;
 			return {
 				id: it.resource.id,
 				name: it.resource.name,
@@ -122,7 +121,7 @@
 			});
 			raw = reset ? page.items : [...raw, ...page.items];
 			cursor = page.next_cursor;
-			void owners.resolve(page.items.map((i) => i.resource.updated_by ?? i.resource.owner_id));
+			void owners.resolve(page.items.map((i) => i.resource.updated_by));
 		} catch (e) {
 			console.error('recent: load error', e);
 			error = t('errors_loadFailed', 'Failed to load items');

frontend/src/routes/recent/page.test.ts

@@ -45,7 +45,6 @@ function withOneFile() {
 					mime_type: 'text/plain',
 					modified_at: 0,
 					name: 'notes.txt',
-					owner_id: 'me',
 					created_by: 'me',
 					updated_by: 'me',
 					folder_id: 'root',

frontend/src/routes/shared/page.test.ts

@@ -46,7 +46,6 @@ function grantItem() {
 			is_root: false,
 			modified_at: 0,
 			name: 'Docs',
-			owner_id: 'me',
 			created_by: 'me',
 			updated_by: 'me',
 			parent_id: null,