Add version provenance to TIFF and NPZ output files

- Embed ppm_library version in TIFF ImageDescription tag
- Include ppm_library_version in NPZ analysis result files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: MichaelSNelson

ppm_library/analysis/workflow.py

@@ -13,6 +13,7 @@
 from scipy import ndimage
 from skimage import io, color
 
+import ppm_library
 from ppm_library.calibration.radial import RadialCalibrator, RadialCalibrationResult
 from ppm_library.imaging.ppm_image import PPMImage, AngleMap
 
@@ -81,6 +82,8 @@ def save(self, path: Union[str, Path]) -> None:
             cal_inv_intercept=np.array([self.calibration.inv_intercept]),
             cal_r_squared=np.array([self.calibration.r_squared]),
             cal_hue_offset=np.array([self.calibration.hue_offset]),
+            # Provenance
+            ppm_library_version=np.array([ppm_library.__version__]),
         )
 
     def print_summary(self) -> None:

ppm_library/imaging/writer.py

@@ -6,12 +6,15 @@
 """
 
 import pathlib
+import platform
 import shutil
 from typing import Optional, Dict
 import numpy as np
 import tifffile as tf
 import logging
 
+import ppm_library
+
 logger = logging.getLogger(__name__)
 
 
@@ -53,9 +56,16 @@ def ome_writer(
             if compression is not None:
                 options["compression"] = compression.lower()
 
+            # Embed provenance in ImageDescription tag
+            description = (
+                f"ppm_library={ppm_library.__version__}"
+                f" python={platform.python_version()}"
+            )
+
             tif.write(
                 data,
                 resolution=(1e4 / pixel_size_um, 1e4 / pixel_size_um),
+                description=description,
                 **options,
             )