fix adk_middleware python module and added adk-middleware demo in doj…

[syedfakher27]

…o app

Python needs modules to be organized in their own folders (packages) to import them correctly. By putting your files in a adk_middleware folder, Python can now recognize it as a proper package and allow you to import from it using:
from adk_middleware import ADKAgent, AgentRegistry, add_adk_fastapi_endpoint

[contextablemark]

Thanks... I'll admit that I'm not an experienced Python developer so your advice on restructuring the package is helpful.

However, the new structure breaks all of the tests - I would expect all of the tests to pass before submitting the PR (and I don't have CI/CD set up yet to do that automatically). And I also realize that my tests (while set up to run using pytest) probably have a non-standard setup. I run them with :

source test_env/bin/activate && PYTHONPATH=src pytest tests/ (separate venv in test_env).

So at a bare minimum, I would expect :

1. Update all test imports to use new adk_middleware package:

Change from:

from adk_agent import ADKAgent
from session_manager import SessionManager

To:

from adk_middleware. import ADKAgent
from adk_middleware import SessionManager

2. Manually run full test suite to ensure no functionality is broken
3. Update documentation to show new import patterns in the existing examples.

Thanks,
Mark

[syedfakher27]

fixed all the test cases and all are passed as well additionally you don't need to set PYTHONPATH=src now because now adk_middleware is acting as python module

[contextablemark]

Great! Thanks for the contribution!

• Mark