fix(python-uv): take into account dependencies on other workspace members

This commit fixes an issue where an application created as a member of a
uv workspace would fail to build if they depended on other workspace
members.

The following shows the problematic workspace structure and the error
message.

```
workspace root
├── lib
│   ├── pyproject.toml
│   └── src
├── pyproject.toml
├── sam-app
│   ├── __init__.py
│   ├── app.py
│   ├── pyproject.toml
│   ├── samconfig.toml
│   └── template.yaml
└── uv.lock
```

```
Build Failed
Error: PythonUvBuilder:ResolveDependencies - UV package build failed: Failed to build from pyproject.toml: Lock file operation failed: Failed to install dependencies using uv: UV pip install failed: Using CPython 3.13.0 interpreter at: /path/to/workspace/.venv/bin/python3
error: Distribution not found at: file:///path/to/workspace/sam-app/lib
```

Even though `lib` and `sam-app` are in the same directory level in the
workspace, the workflow attempts to install `lib` under `sam-app`.

In the workflow, `uv export` outputs a list of dependency packages,
which is then passed to `uv pip install` for installation. When doing
so, [`uv export` outputs relative paths from the workspace root][1].
Therefore, `uv pip install` must be run from the workspace root, not
from the application directory.

Additionally, dependencies on other packages within the workspace are
exported as editable installations (e.g., `-e ./lib`) by default.
When this is passed to `uv pip install`, only the `.pth` (path
configuration) file for the package will be installed without the
package body. To prevent this, the `--no-editable` option needs to be
used.

[1]: astral-sh/uv#20238

Author: noritada

aws_lambda_builders/workflows/python_uv/packager.py

@@ -332,6 +332,7 @@ def _build_from_lock_file(
                 "--no-emit-project",  # Don't include the project itself, only dependencies
                 "--no-hashes",  # Skip hashes for cleaner output (optional)
                 "--no-default-groups",  # Exclude PEP 735 default groups (e.g. dev/test) from Lambda zips
+                "--no-editable",  # Export editable dependencies as non-editable
                 "--output-file",
                 temp_requirements,
                 # We want to specify the version because `uv export` might default to using a different one
@@ -344,6 +345,15 @@ def _build_from_lock_file(
             if rc != 0:
                 raise LockFileError(reason=f"Failed to export lock file: {stderr}")
 
+            # Get the workspace root (or project directory if no workspace is used)
+            # For packages in the workspace, exported paths are relative to the workspace root,
+            # regardless of where in the workspace uv export is called
+            workspace_args = ["workspace", "dir"]
+            rc, stdout, stderr = self._uv_runner._uv.run_uv_command(workspace_args, cwd=project_dir)
+            if rc != 0:
+                raise LockFileError(reason=f"Failed to get workspace root: {stderr}")
+            workspace_dir = stdout.strip()
+
             # Install with platform targeting
             self._uv_runner.install_requirements(
                 requirements_path=temp_requirements,
@@ -352,7 +362,7 @@ def _build_from_lock_file(
                 config=config,
                 python_version=python_version,
                 platform="linux",
-                cwd=project_dir,
+                cwd=workspace_dir,
                 architecture=architecture,
             )
         except LockFileError: