feat: Roche Cedex BioHT - Add support for mM unit (mmol/L) (#1119)

current issue:
<img width="911" height="96" alt="image"
src="https://github.com/user-attachments/assets/a5d66eea-417a-4fb9-b88e-9258e4a7dbdd"
/>
Fix: add support for _mM_ unit

Author: joshua-benchling

src/allotropy/parsers/roche_cedex_bioht/roche_cedex_bioht_structure.py

@@ -28,6 +28,12 @@
 from allotropy.parsers.utils.pandas import map_rows, SeriesData
 from allotropy.parsers.utils.uuids import random_uuid_str
 
+# Maps source units to (target_unit, conversion_multiplier)
+UNIT_CONVERSIONS: dict[str, tuple[str, float]] = {
+    "mg/L": ("g/L", 0.001),
+    "mM": ("mmol/L", 1.0),
+}
+
 
 @dataclass(frozen=True)
 class Title:
@@ -111,15 +117,18 @@ def create(data: SeriesData) -> RawMeasurement:
 
     @staticmethod
     def _get_value_and_unit(value: JsonFloat, unit: str) -> tuple[JsonFloat, str]:
-        multiplier = 1.0
-        if unit == "mg/L":
-            unit = "g/L"
-            multiplier = 1 / 1000
-
-        if isinstance(value, int | float):
-            value = value * multiplier
-
-        return value, unit
+        normalized_unit = unit.strip()
+
+        # Check if unit needs conversion
+        if normalized_unit in UNIT_CONVERSIONS:
+            target_unit, multiplier = UNIT_CONVERSIONS[normalized_unit]
+            if isinstance(value, int | float):
+                converted_value: JsonFloat = value * multiplier
+            else:
+                converted_value = value
+            return converted_value, target_unit
+
+        return value, normalized_unit
 
 
 def create_measurements(data: pd.DataFrame) -> dict[str, dict[str, RawMeasurement]]:

tests/parsers/roche_cedex_bioht/testdata/roche_cedex_bioht_example01.txt

@@ -2,7 +2,7 @@
 40	2023-09-15 16:55:51	SMPL1		SAM	        	GLN2B	        	mmol/L	 	  2.45	  0.17138	R
 40	2023-09-15 16:55:53	SMPL1		SAM	        	ODB	        	OD	 	  6.32	  1.05394	R
 40	2023-09-15 16:56:18	SMPL1		SAM	        	LDH2B	        	U/L	 	  88.09	  0.00728	R
-40	2023-09-15 16:56:26	SMPL1		SAM	        	NH3B	        	mmol/L	 	  1.846	  0.05333	R
+40	2023-09-15 16:56:26	SMPL1		SAM	        	NH3B	        	mM	 	  1.846	  0.05333	R
 40	2023-09-15 16:56:37	SMPL1		SAM	        	LAC2B	        	g/L	 	  0.02	  0.01567	R
 40	2023-09-15 16:56:48	SMPL1		SAM	        	TP2LB	        	g/L	 	  4.6	  0.14883	R
 40	2023-09-15 16:56:58	SMPL2		SAM	        	GLN2B	        	mmol/L	 	  2.40	  0.16787	R
@@ -20,7 +20,7 @@
 40	2023-09-15 16:59:16	SMPL3		SAM	        	LAC2B	        	g/L	< TEST RNG	< 0.00	  0.00329	R
 40	2023-09-15 16:59:38	SMPL3		SAM	        	TP2D	        	g/L	< TEST RNG	< 40.0	  0.02702	R
 40	2023-09-15 17:00:52	SMPL3		SAM	        	TP2LB	        	g/L	 	  4.8	  0.15436	R
-40	2023-09-16 10:12:10	SMPL4		SAM	        	GLN2B	        	mmol/L	 	  2.07	  0.14503	R
+40	2023-09-16 10:12:10	SMPL4		SAM	        	GLN2B	        	mM	 	  2.07	  0.14503	R
 40	2023-09-16 10:12:12	SMPL4		SAM	        	ODB	        	OD	 	  4.09	  0.68160	R
 40	2023-09-16 10:13:29	SMPL4		SAM	        	LDH2B	        	U/L	 	  334.84	  0.02665	R
 40	2023-09-16 10:13:37	SMPL4		SAM	        	NH3B	        	mmol/L	 	  3.788	  0.11415	R