fix: parallelize WA sync and surface scheduler errors in historial

- whatsapp_sync: send patients concurrently (asyncio.gather + semaphore=10) instead of sequentially — eliminates long waits with many patients
- envios_erp: auto-refresh historial every 60s when scheduler tab is active
- main: wrap scheduler job to catch exceptions and log them to sync_wa_log so failures are visible in historial

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

main.py

@@ -13,6 +13,7 @@ from apscheduler.schedulers.asyncio import AsyncIOScheduler
 from app.database import init_db
 from app.auth import decode_token
 from app.services.scheduler import sync_recientes
+from app.services.whatsapp_sync import guardar_sync_log
 
 app = FastAPI(title="RIPS Manager", version="1.0.0")
 _scheduler = AsyncIOScheduler()
@@ -63,8 +64,27 @@ async def startup():
     config_defaults()
     query_defaults()
     contratos_defaults()
-    _scheduler.add_job(sync_recientes, "interval", minutes=1, id="wa_sync_recientes",
-                       kwargs={"ventana_min": 10}, max_instances=1, coalesce=True)
+    async def _job_sync():
+        try:
+            resultado = await sync_recientes(ventana_min=10)
+            if not resultado.get("ok") and resultado.get("error"):
+                guardar_sync_log(
+                    {"total": 0, "created": 0, "skipped": 0, "updated": 0, "errores": 1, "detalle": [
+                        {"ok": False, "action": "error", "message": resultado["error"], "doc": "", "nombre": "scheduler-error"}
+                    ]},
+                    None, origen="scheduler", modo="upsert"
+                )
+        except Exception as exc:
+            import traceback
+            guardar_sync_log(
+                {"total": 0, "created": 0, "skipped": 0, "updated": 0, "errores": 1, "detalle": [
+                    {"ok": False, "action": "error", "message": str(exc), "doc": "", "nombre": "scheduler-exception"}
+                ]},
+                None, origen="scheduler", modo="upsert"
+            )
+
+    _scheduler.add_job(_job_sync, "interval", minutes=1, id="wa_sync_recientes",
+                       max_instances=1, coalesce=True)
     _scheduler.start()