Link aws-cdk-lib versions between node and Python

I've run into problems when the node version of **aws-cdk-lib** used to [build the Python bindings](https://github.com/developmentseed/eoapi-cdk/blob/03472ba911e7fc791ed50d33b3883ac6909a82ed/.github/workflows/build.yaml#L31-L32) differs from the version used in a Python project that's deploying via **eoapi-cdk**. In particular, breaking changes to the **aws-cdk-lib** can lead to hard-to-debug tracebacks like this one, which occurred because of a breaking change [v2.224.0](https://github.com/aws/aws-cdk/releases/tag/v2.224.0) of **eoapi-cdk**:

```text
Traceback (most recent call last):
File "", line 198, in _run_module_as_main
File "", line 88, in _run_code
File "/home/runner/work/ava-backend/ava-backend/infrastructure/aws/app.py", line 6, in
from .stacks.app import AppStack
File "/home/runner/work/ava-backend/ava-backend/infrastructure/aws/stacks/app.py", line 8, in
from eoapi_cdk import (
File "/home/runner/work/ava-backend/ava-backend/.venv/lib/python3.12/site-packages/eoapi_cdk/__init__.py", line 1043, in
class PgStacDatabase(
File "/home/runner/work/ava-backend/ava-backend/.venv/lib/python3.12/site-packages/eoapi_cdk/__init__.py", line 1122, in PgStacDatabase
storage_encryption_key: typing.Optional[_aws_cdk_aws_kms_ceddda9d.IKeyRef] = None,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'aws_cdk.aws_kms' has no attribute 'IKeyRef'
```

The simplest solution might just be explicitly pinning the **aws-cdk-version** in both `package.json` and as a required dependency in `pyproject.toml` (it's currently optional), but there maybe be a more elegant way? I'm also curious why **aws-cdk-lib** _isn't_ a required dependency of the Python package to begin with...