🐛 Bug: Image.new size parameter uses (height, width) but PIL expects (width, height)

## Description

In `macarons/image_text.py` line 82:
```python
def generate_datapoint(height, width) -> Datapoint:
...
image = Image.new(mode='RGB', size=(height, width), color=color_list[1])
```

PIL's `Image.new()` expects `size=(width, height)`, but the code passes `(height, width)`. This means images are transposed — a 224x448 request would create a 448x224 image.

Similarly in the circle positioning:
```python
center = (
random.randint(radius, height - radius), # should be width
random.randint(radius, width - radius), # should be height
)
```

## File & Line
- `macarons/image_text.py`, lines 82, 85-88

## Why It Matters
For square images (the default 224x224) this doesn't matter, but for non-square images the output is wrong.

## Suggested Fix
```python
image = Image.new(mode='RGB', size=(width, height), color=color_list[1])
center = (
random.randint(radius, width - radius),
random.randint(radius, height - radius),
)
```

Open macarons/image_text.py and inspect generate_datapoint around lines 82-88. Verify the non-square image size and circle center coordinates against PIL's width-first convention; done means a 224x448 request produces the requested dimensions and positions the circle within them.

Written by the indexing model from the issue text.