Use Data Section by Default instead of AMQPValue for the message creation

[Gsantomaggio]

• Update RabbitMQ to 4.1 for ci
• Breaking change Change the default section body for message creation. It uses Data Section (0x75) instead of AmqpValue (0x77)
• It is better to use Data Section for cross-protocol applications.

[Copilot]

Pull Request Overview

This PR changes the default message body section from AmqpValue to Data by enforcing the use of byte representations and updates tests and examples accordingly. Key changes include updating message body conversion using the new Converter utility, enforcing a new inferred flag check in publishers, and modifying management message construction.

Reviewed Changes

Copilot reviewed 22 out of 24 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/test_consumer.py	Updated message assertion to use Converter for byte-to-string conversion.
tests/test_connection.py	Added assertions to verify existence of SSL certificate files.
tests/test_amqp_091.py	Updated publishing and consuming logic to use Converter for string and byte conversions.
tests/conftest.py	Simplified annotation dictionary construction.
rabbitmq_amqp_python_client/utils.py	Introduced Converter class for handling string/byte conversions.
rabbitmq_amqp_python_client/qpid/proton/_message.py	Added an explicit inferred parameter with minor refactoring of the inferred property.
rabbitmq_amqp_python_client/qpid/proton/_exceptions.py	Added a new ArgumentOutOfRangeException for parameter validation.
rabbitmq_amqp_python_client/publisher.py	Implemented new validations ensuring message.body is bytes and inferred is True.
rabbitmq_amqp_python_client/management.py	Modified message creation to set inferred=False for management messages.
rabbitmq_amqp_python_client/init.py	Exported the Converter from the client package.
pyproject.toml	Reorganized dependencies with test and development groups.
examples/tls/tls_example.py	Updated TLS example to use Converter in message handling.
examples/streams/example_with_streams.py	Updated message creation to use the Converter utility.
examples/reconnection/reconnection_example.py	Updated message publishing to use Converter for byte conversions.
examples/oauth/oAuth2.py	Updated oAuth example to use Converter for message creation and message logging.
examples/getting_started/getting_started.py	Updated basic example to convert messages using Converter.
examples/README.md	Fixed reference to the oAuth2 example.
README.md	Updated messaging example to use Converter and corrected oAuth2 example reference.

Files not reviewed (2)

• .ci/ubuntu/gha-setup.sh: Language not supported
• Makefile: Language not supported

[Copilot]

The management code creates a Message with inferred set to False, but the publisher now enforces that message.inferred must be True. Consider updating the management message creation to set inferred=True or adjust the publisher's validation for management messages.

Suggested change

	inferred=False,
	inferred=True,