refactor(treewide): formatting and ruff fixes, + manually enabled F401

Signed-off-by: Akhil Narang <me@akhilnarang.dev>
diff --git a/erpnext/utilities/bulk_transaction.py b/erpnext/utilities/bulk_transaction.py
index 343a881..bff83f9 100644
--- a/erpnext/utilities/bulk_transaction.py
+++ b/erpnext/utilities/bulk_transaction.py
@@ -18,9 +18,7 @@
 
 	length_of_data = len(deserialized_data)
 
-	frappe.msgprint(
-		_("Started a background job to create {1} {0}").format(to_doctype, length_of_data)
-	)
+	frappe.msgprint(_("Started a background job to create {1} {0}").format(to_doctype, length_of_data))
 	frappe.enqueue(
 		job,
 		deserialized_data=deserialized_data,
@@ -61,7 +59,7 @@
 			try:
 				frappe.db.savepoint("before_creation_state")
 				task(log.transaction_name, log.from_doctype, log.to_doctype)
-			except Exception as e:
+			except Exception:
 				frappe.db.rollback(save_point="before_creation_state")
 				update_log(log.name, "Failed", 1, str(frappe.get_traceback(with_context=True)))
 			else:
@@ -87,7 +85,7 @@
 			doc_name = d.get("name")
 			frappe.db.savepoint("before_creation_state")
 			task(doc_name, from_doctype, to_doctype)
-		except Exception as e:
+		except Exception:
 			frappe.db.rollback(save_point="before_creation_state")
 			fail_count += 1
 			create_log(
@@ -99,9 +97,7 @@
 				log_date=str(date.today()),
 			)
 		else:
-			create_log(
-				doc_name, None, from_doctype, to_doctype, status="Success", log_date=str(date.today())
-			)
+			create_log(doc_name, None, from_doctype, to_doctype, status="Success", log_date=str(date.today()))
 
 	show_job_status(fail_count, len(deserialized_data), to_doctype)