debug: show ITEM columns and first row to find join key

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

app/routes/debug_fb.py

@@ -41,19 +41,9 @@ async def find_cups(request: Request, user: dict = Depends(get_current_user)):
     """)
     results["columnas_item"] = [r["campo"] for r in rows1] if ok1 else f"error: {err1}"
 
-    # 2. Muestra de ITEM para el examen CH4
-    ok3, err3, rows3 = fb.execute_query(
-        "SELECT FIRST 1 i.* FROM ITEM i WHERE TRIM(i.CODIGO) = :cod",
-        {"cod": "CH4"}
-    )
-    if ok3 and rows3:
-        results["item_ch4_por_codigo"] = rows3[0]
-    else:
-        # Intentar con otro campo
-        ok3b, err3b, rows3b = fb.execute_query(
-            "SELECT FIRST 3 i.* FROM ITEM i WHERE i.CUPS_DETALLE IS NOT NULL AND TRIM(i.CUPS_DETALLE) <> ''"
-        )
-        results["item_muestra_con_cups"] = rows3b if ok3b else f"error: {err3b}"
+    # 2. Primera fila de ITEM (para ver valores reales)
+    ok2, err2, rows2 = fb.execute_query("SELECT FIRST 1 i.* FROM ITEM i")
+    results["item_primera_fila"] = rows2[0] if (ok2 and rows2) else f"error: {err2}"
 
     # 3. Descuentos en RELACION
     ok4, _, rows4 = fb.execute_query("""