feat: AI photo enhancement (Real-ESRGAN container) + restore original

- new photo-ai service: FastAPI + Real-ESRGAN x2plus on CPU, internal only
- async job queue in server (POST enhance-ai / GET status), 5min timeout, sequential processing
- keep original photo backup (entries.photo_original_path, uploads/.originals), restore-original endpoint
- UI: AI button and restore-original button in enhance modal
- db: photo_original_path column (init.sql, migration.sql, runtime ensure)

docker-compose.yml

@@ -37,6 +37,7 @@ services:
       AI_MODEL: ${AI_MODEL:-qwen2.5-1.5b-instruct-q4_k_m.gguf}
       AI_PROMPT: ${AI_PROMPT:-}
       AI_REQUEST_TIMEOUT_MS: ${AI_REQUEST_TIMEOUT_MS:-120000}
+      PHOTO_AI_URL: ${PHOTO_AI_URL:-http://photo-ai:8080}
       NODE_ENV: production
       TZ: Europe/Moscow
     depends_on:
@@ -113,7 +114,20 @@ services:
       - "8080:8080"
 
 
+  # ИИ-улучшение фотографий (Real-ESRGAN x2, CPU).
+  # Поднимается вместе со стеком; если не нужен — PHOTO_AI_URL пустой в .env.
+  photo-ai:
+    build: ./photo-ai
+    container_name: photo-ai
+    restart: unless-stopped
+    environment:
+      MODEL_PATH: /models/RealESRGAN_x2plus.pth
+      MAX_INPUT_PIXELS: ${PHOTO_AI_MAX_PIXELS:-4000000}
+      TZ: Europe/Moscow
+    volumes:
+      - photo-ai-models:/models
 
 
 volumes:
   pgdata:
+  photo-ai-models: