Add note about native OpenMS Mobilogram class

Added documentation note that OpenMS C++ has a native Mobilogram class
that may not yet be wrapped in pyopenms, and this wrapper uses
MSChromatogram as the underlying representation.

Co-authored-by: timosachsenberg <5803621+timosachsenberg@users.noreply.github.com>

Author: Copilot

README.md

@@ -338,7 +338,9 @@ print(df)
 
 #### Mobilograms
 
-Mobilograms represent the ion mobility dimension, showing intensity vs. drift time for a specific m/z:
+Mobilograms represent the ion mobility dimension, showing intensity vs. drift time for a specific m/z.
+
+**Note:** OpenMS C++ has a native `Mobilogram` class that may not yet be wrapped in pyopenms. This wrapper uses `MSChromatogram` as the underlying representation for mobilogram data.
 
 ```python
 from openms_python import Py_Mobilogram

openms_python/py_mobilogram.py

@@ -3,6 +3,10 @@
 
 A mobilogram is a chromatogram in the ion mobility dimension, representing
 intensity vs. drift time for a specific m/z value.
+
+Note: OpenMS C++ has a native Mobilogram class that may not yet be wrapped
+in pyopenms. This wrapper uses MSChromatogram as the underlying representation
+for mobilogram data.
 """
 
 from typing import Tuple, Optional
@@ -20,6 +24,10 @@ class Py_Mobilogram(MetaInfoMappingMixin):
     A mobilogram represents the ion mobility dimension for a specific m/z,
     showing intensity vs. drift time (or other ion mobility values).
 
+    Note: OpenMS C++ has a native Mobilogram class that may not yet be wrapped
+    in pyopenms. This wrapper uses MSChromatogram as the underlying representation
+    for mobilogram data.
+
     Example:
         >>> mob = Py_Mobilogram(native_chromatogram)
         >>> print(f"m/z: {mob.mz:.4f}")