se migran los print de los módulos a logging con nivel explícito

pipeline_utils.log pasa a usar logging (parámetro severity) y los print de
pipeline, sapb1_manager, hana_manager, outlook_utilities, email_utilities y
main pasan a logger.info/warning/error, de modo que LOG_LEVEL filtre por
severidad. El texto del log no cambia. Se mantienen los print de CLI en
sunat_schema (__main__), tools/ y tests/.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

hana_manager.py

@@ -1,9 +1,12 @@
 #!/usr/bin/env python3
+import logging
 import os
 from datetime import datetime, date
 from hdbcli import dbapi
 from dotenv import load_dotenv
 
+logger = logging.getLogger(__name__)
+
 # ============================================================================
 # CONFIGURACIÓN
 # ============================================================================
@@ -31,7 +34,7 @@ def get_connection():
         )
         return conn
     except Exception as e:
-        print(f"    ❌ Error conectando a HANA: {e}")
+        logger.error(f"    ❌ Error conectando a HANA: {e}")
         return None 
 
 # ============================================================================
@@ -89,7 +92,7 @@ def _query_delivery_table(connection, tabla: str, tipo: str, serie: str, numero:
             results.append(registro)
         return results
     except Exception as e:
-        print(f"    ❌ Error en consulta HANA get_delivery ({tabla}): {e}")
+        logger.error(f"    ❌ Error en consulta HANA get_delivery ({tabla}): {e}")
         return []
     finally:
         if cursor:
@@ -127,7 +130,7 @@ def obtener_valor_referencial(serie: str, numero: str) -> float:
         valor = dict(zip(columns, row)).get("ValorReferencial")
         return float(valor) if valor is not None else 0.0
     except Exception as e:
-        print(f"    ❌ Error en consulta HANA obtener_valor_referencial: {e}")
+        logger.error(f"    ❌ Error en consulta HANA obtener_valor_referencial: {e}")
         return 0.0
     finally:
         if cursor: