Pre-validated ConnectionManager input

[christopherfish]

Allow dynamic ConnectionManager methods to accept a single argument of the schema input type. That is, both of the following work:

from mindtrace.services.sample.echo_service import EchoInput, EchoService
echo_service_manager = EchoService.launch(url="http://localhost:8092", timeout=30)

result = echo_service_manager.echo(message="Integration test message")
assert result.echoed == "Integration test message"

input_message = EchoInput(message="Pre-validated test message")
result = echo_service_manager.echo(input_message)
assert result.echoed == "Pre-validated test message"

Tests should run and pass via uv sync; ds test and have 100% coverage in Services.