feat: LibraryItem.requestId nullable (scanned haves need no request) + test cleanup

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/prisma/migrations/20260711145610_library_item_optional_request/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "LibraryItem" ALTER COLUMN "requestId" DROP NOT NULL;

web/prisma/schema.prisma

@@ -72,8 +72,8 @@ model Candidate {
 
 model LibraryItem {
   id           String   @id @default(cuid())
-  request      Request  @relation(fields: [requestId], references: [id], onDelete: Cascade)
+  request      Request? @relation(fields: [requestId], references: [id], onDelete: Cascade)
-  requestId    String   @unique
+  requestId    String?  @unique
   artist       String
   album        String
   path         String

web/src/test/setup.ts

@@ -12,6 +12,7 @@ beforeEach(async () => {
   // Job cascades from Request; Request.monitoredReleaseId is SetNull. Delete children first.
   await prisma.job.deleteMany();
   await prisma.request.deleteMany();
+  await prisma.libraryItem.deleteMany();
   await prisma.monitoredRelease.deleteMany();
   await prisma.watchedArtist.deleteMany();
   await prisma.config.deleteMany();

worker/tests/conftest.py

@@ -24,6 +24,7 @@ def conn():
     with connection.cursor() as cur:
         cur.execute('DELETE FROM "Job"')
         cur.execute('DELETE FROM "Request"')
+        cur.execute('DELETE FROM "LibraryItem"')
         cur.execute('DELETE FROM "MonitoredRelease"')
         cur.execute('DELETE FROM "WatchedArtist"')
         cur.execute('DELETE FROM "Config"')
@@ -33,6 +34,7 @@ def conn():
     with connection.cursor() as cur:
         cur.execute('DELETE FROM "Job"')
         cur.execute('DELETE FROM "Request"')
+        cur.execute('DELETE FROM "LibraryItem"')
         cur.execute('DELETE FROM "MonitoredRelease"')
         cur.execute('DELETE FROM "WatchedArtist"')
         cur.execute('DELETE FROM "Config"')

worker/tests/test_library_item_optional_request.py

@@ -0,0 +1,13 @@
+def test_library_item_can_have_null_request(conn):
+    with conn.cursor() as cur:
+        cur.execute(
+            'INSERT INTO "LibraryItem" (id, "requestId", artist, album, path, source, format, '
+            '"qualityClass", "importedAt") '
+            "VALUES (gen_random_uuid()::text, NULL, 'A', 'B', '/m/A/B', 'scan', 'FLAC', 2, now()) "
+            "RETURNING id"
+        )
+        lib_id = cur.fetchone()[0]
+    conn.commit()
+    with conn.cursor() as cur:
+        cur.execute('SELECT "requestId" FROM "LibraryItem" WHERE id = %s', (lib_id,))
+        assert cur.fetchone()[0] is None