fix: include sagemaker.mlops subpackages in sagemaker-mlops wheel (Fixes #5612)

[junagent]

Summary

Set namespaces=false in [tool.setuptools.packages.find] to ensure subpackages sagemaker.mlops, sagemaker.mlops.feature_store, and sagemaker.mlops.feature_store.feature_processor are included in the wheel distribution.

Root Cause

The sagemaker-mlops wheel was missing the mlops subpackage tree because namespaces=true (PEP 420 namespace package mode) caused setuptools to exclude subdirectories from the wheel.

Fix

Changed in sagemaker-mlops/pyproject.toml:

[tool.setuptools.packages.find]
where = ["src"]
include = ["sagemaker*"]
- namespaces = true
+ namespaces = false

With namespaces=false, setuptools treats sagemaker as a regular package and correctly includes all discovered subpackages: mlops, mlops.feature_store, mlops.feature_store.feature_processor.

Testing

After this fix, the wheel should include:

• sagemaker_mlops-*/sagemaker/__init__.py
• sagemaker_mlops-*/sagemaker/mlops/__init__.py
• sagemaker_mlops-*/sagemaker/mlops/feature_store/__init__.py
• sagemaker_mlops-*/sagemaker/mlops/feature_store/feature_processor/__init__.py
• All corresponding .py modules

Fixes #5612

[junagent]

Bug Label Request

This fix addresses a critical distribution regression (Issue #5612) where namespaces = true caused setuptools to treat sagemaker as a PEP 420 namespace package, silently excluding all subdirectories (sagemaker.mlops, sagemaker.mlops.feature_store, sagemaker.mlops.feature_store.feature_processor) from the sagemaker-mlops wheel.

Impact: Users who install sagemaker-mlops from PyPI cannot use any feature processor, feature store, or MLOps workflow APIs. The installation succeeds, but all submodules are missing at runtime.

Root cause: namespaces = true in [tool.setuptools.packages.find] is incompatible with this package structure where src/sagemaker/__init__.py contains actual code. This causes setuptools to only include the root namespace marker, not the full package tree.

Fix verification:

• Before: wheel contains only sagemaker/__init__.py (namespace marker, no submodules)
• After: wheel contains full sagemaker/, sagemaker/mlops/, sagemaker/mlops/feature_store/, sagemaker/mlops/feature_store/feature_processor/ and all .py modules

Requesting a bug label for proper triage and bounty categorization.