Initial commit: ASR v2 with multi-venv isolation

- faster-whisper, Qwen3-ASR, gateway 각 컴포넌트별 Python venv 분리
- 기본언어 한국어(ko)
- 처리내역 탭: 목록/상세/원본파일 재생/삭제
- 백엔드별 동적 모델 드랍다운
- /history, /uploads API 추가
- 기존 인스턴스(port 18100) 보존, 신규 port 18101

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

quadlet/asr-v2.container

@@ -0,0 +1,26 @@
+[Unit]
+Description=ASR v2 (faster-whisper + Qwen3-ASR)
+After=network-online.target
+Wants=network-online.target
+
+[Container]
+ContainerName=asr-v2
+Image=localhost/asr-v2:latest
+Network=proxy
+User=983:983
+PublishPort=172.30.1.41:18101:8000
+Volume=/srv/asr/models-cache:/srv/asr/models-cache:Z
+Volume=/srv/asr/uploads:/srv/asr/uploads:Z
+Volume=/srv/asr/results:/srv/asr/results:Z
+Volume=/srv/asr/custom-models:/srv/asr/custom-models:Z
+EnvironmentFile=/srv/asr/env/asr.env
+# GPU 패스스루 (CDI 방식 또는 아래 줄 활성화)
+# AddDevice=nvidia.com/gpu=all
+HealthCmd=curl -sf http://127.0.0.1:8000/health
+
+[Service]
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target