fix: format scheduler times in Colombia UTC-5 server-side

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

main.py

@@ -77,19 +77,36 @@ async def shutdown():
 async def scheduler_status():
     from fastapi.responses import JSONResponse
     from app.database import get_connection
+    from datetime import timezone, timedelta
+    COL = timezone(timedelta(hours=-5))
+
     job = _scheduler.get_job("wa_sync_recientes")
-    next_run = job.next_run_time.isoformat() if job and job.next_run_time else None
+    next_run_str = None
+    if job and job.next_run_time:
+        next_run_str = job.next_run_time.astimezone(COL).strftime("%H:%M:%S")
+
     conn = get_connection()
     row = conn.execute(
-        "SELECT created_at, total, errores, origen "
-        "FROM sync_wa_log WHERE origen='scheduler' ORDER BY id DESC LIMIT 1"
+        "SELECT created_at, total, errores FROM sync_wa_log "
+        "WHERE origen='scheduler' ORDER BY id DESC LIMIT 1"
     ).fetchone()
     conn.close()
+
+    ultimo = None
+    if row:
+        from datetime import datetime
+        ts_utc = datetime.fromisoformat(row["created_at"].replace(" ", "T") + "+00:00")
+        ultimo = {
+            "hora":    ts_utc.astimezone(COL).strftime("%H:%M:%S"),
+            "total":   row["total"],
+            "errores": row["errores"],
+        }
+
     return JSONResponse({
-        "running": _scheduler.running,
+        "running":    _scheduler.running,
         "job_exists": job is not None,
-        "next_run": next_run,
-        "ultimo_log": dict(row) if row else None,
+        "next_run":   next_run_str,
+        "ultimo_log": ultimo,
     })