Enable bitmask support for TargetsExtraction in Python API

[DeepApnea]

Issue

The Python API for iTwin Capture Modeler does not allow combining multiple TargetsExtraction enum values (e.g., AprilTags + QR), even though this functionality is clearly supported in the C++ SDK and the GUI. Internally, the TargetsExtraction values behave like a bitmask-compatible enum, and combining them (e.g., 1 | 2 = 3) results in valid integer values.

However, when trying to set this combined value in Python, the SDK throws a Boost.Python.ArgumentError, because the setter expects a strict single enum instance, not a composite bitmask. This behavior breaks automation workflows where multi-tag extraction is required from code.

What I Tried

atSettings.targetsExtraction = (
    itwincapturemodeler.TargetsExtraction.TargetsExtraction_AprilTags |
    itwincapturemodeler.TargetsExtraction.TargetsExtraction_QR
)

Please update the Python bindings for ATSettings.targetsExtraction to support bitmask-style combinations, similar to how adjustmentConstraints works with AdjustmentAndPositioning, so we can use combined tag types in a single aerotriangulation pass.