使用 qwen 进行语音识别，加入 tag

Co-authored-by: Copilot <copilot@github.com>

prisma/migrations/20260429_add_asr_content_tags/migration.sql

@@ -0,0 +1,5 @@
+ALTER TABLE "VideoTranscript"
+ADD COLUMN "content_tags" TEXT[] NOT NULL DEFAULT ARRAY[]::TEXT[];
+
+CREATE INDEX "video_transcript_content_tags_idx"
+ON "VideoTranscript" USING GIN ("content_tags");

prisma/schema.prisma

@@ -145,11 +145,13 @@ model VideoTranscript {
   audio_type         String?
   transcript         String[]
   non_speech_summary String?
+  content_tags       String[]                 @default([])
   createdAt          DateTime                 @default(now())
   updatedAt          DateTime                 @updatedAt
   transcript_zh_tsv  Unsupported("tsvector")?
   video              Video                    @relation(fields: [videoId], references: [aweme_id], onDelete: Cascade)
 
   @@index([videoId])
+  @@index([content_tags], map: "video_transcript_content_tags_idx", type: Gin)
   @@index([transcript_zh_tsv], map: "video_transcript_zh_idx", type: Gin)
 }