Airflow 3.2 unable to handle \0 in dag files

### Under which category would you file this issue? Airflow Core ### Apache Airflow version 3.2.0 ### What happened and how to reproduce it? Have a dag file in airflow 3.1.8 with a \0 literal character, then try to upgrade to airflow 3.2.0. Migrations will fail because \0 cannot be serialized into JSONB ``` field_del = '@@\0@@' record_del = '^^\0^^' ``` ### What you think should happen instead? We have dag(s) that process CSV files that use \0 as a delimiter, and we have the delimiter defined in the dag file. These should not prevent upgrading to 3.2.0 ### Operating System rhel 8.6 ### Deployment Docker-Compose ### Apache Airflow Provider(s) _No response_ ### Versions of Apache Airflow Providers apache-airflow==3.2.0 apache-airflow-client==3.1.3 apache-airflow-providers-amazon==9.22.0 apache-airflow-providers-celery==3.15.0 apache-airflow-providers-common-compat==1.14.3 apache-airflow-providers-common-io==1.7.2 apache-airflow-providers-common-sql==1.34.0 apache-airflow-providers-fab==3.6.1 apache-airflow-providers-ftp==3.14.0 apache-airflow-providers-http==6.0.0 apache-airflow-providers-imap==3.10.0 apache-airflow-providers-postgres==6.5.0 apache-airflow-providers-sftp==5.5.0 apache-airflow-providers-smtp==2.4.5 apache-airflow-providers-snowflake==6.7.0 apache-airflow-providers-sqlite==4.2.0 apache-airflow-providers-ssh==4.2.0 apache-airflow-providers-standard==1.12.3 ### Official Helm Chart version Not Applicable ### Kubernetes Version Not Applicable ### Helm Chart configuration _No response_ ### Docker Image customizations ``` FROM docker.io/apache/airflow:3.2.0-python3.12 USER root RUN apt-get update && \ apt-get install -y \ bash \ git \ build-essential \ gcc \ libffi-dev \ musl-dev \ libpq-dev \ xmlsec1 \ postgresql # disable strict host key checking for ssh to support saspy RUN echo "StrictHostKeyChecking no" >> /etc/ssh/ssh_config USER airflow # set dontwritebytecode to prevent __pycache__ directories # we don't need th…