🚀 Production: 3-day deep search fix + Lifecycle UI + Data persistence

backend/app/services/mercado_publico.py

@@ -213,19 +213,23 @@ async def _fetch(params: Dict[str, str], retries: int = 3) -> List[Tender]:
     return []
 
 async def get_active_tenders() -> List[Tender]:
-    """Fetch tenders active today in Chile (UTC-4)."""
-    # Force Chile time (UTC-4)
+    """Fetch tenders from the last 3 days to ensure good coverage."""
     chile_tz = timezone(timedelta(hours=-4))
-    today = datetime.now(chile_tz).strftime("%d%m%Y")
-    results = await _fetch({"fecha": today})
+    all_results = []
+    seen_codes = set()
     
-    # Fallback to yesterday if today is empty (common early in the morning)
-    if not results:
-        yesterday = (datetime.now(chile_tz) - timedelta(days=1)).strftime("%d%m%Y")
-        print(f"ℹ️ Today ({today}) is empty, falling back to yesterday ({yesterday})")
-        results = await _fetch({"fecha": yesterday})
-    
-    return results
+    # Fetch today, yesterday, and day before yesterday
+    for i in range(3):
+        date_to_fetch = (datetime.now(chile_tz) - timedelta(days=i)).strftime("%d%m%Y")
+        print(f"[MP API] Fetching tenders for: {date_to_fetch} (Day -{i})")
+        day_results = await _fetch({"fecha": date_to_fetch})
+        
+        for t in day_results:
+            if t.code not in seen_codes:
+                seen_codes.add(t.code)
+                all_results.append(t)
+                
+    return all_results
 
 async def get_tenders_by_date(date_ddmmaaaa: str) -> List[Tender]:
     """Fetch tenders for a specific date (ddmmaaaa)."""