feat: implement Lucky California scraper with Playwright + BeautifulSoup

- Add BaseScraper with rate limiting, retries, session management
- Add LuckyCaliforniaScraper with Playwright for dynamic content
- Add ScraperService to save scraped items to grocery_item table
- Connect /api/admin/scrape to ScraperService
- Update ORIENTATION.md phase table

backend/app/api/admin.py

@@ -2,6 +2,7 @@ from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.orm import Session
 from app.database import get_db
 from app.models import ScrapeLog, EmailLog, MealPlan
+from app.services.scraper_service import ScraperService
 from typing import List, Optional
 from datetime import datetime, timedelta
 
@@ -10,22 +11,10 @@ router = APIRouter()
 
 @router.post("/scrape")
 def trigger_scrape(source: str = "lucky_california", scrape_type: str = "weekly_ad", db: Session = Depends(get_db)):
-    scrape_log = ScrapeLog(
-        source=source,
-        scrape_type=scrape_type,
-        status="started",
-        started_at=datetime.now()
-    )
-    db.add(scrape_log)
-    db.commit()
-    db.refresh(scrape_log)
+    scraper_service = ScraperService(db)
+    result = scraper_service.run_scrape(source=source, scrape_type=scrape_type)
 
-    return {
-        "message": "Scrape initiated",
-        "scrape_id": str(scrape_log.id),
-        "source": source,
-        "scrape_type": scrape_type
-    }
+    return result
 
 
 @router.get("/logs")