Fix: keep numpy 1.26 for TF/MEGNet compat (fairchem works despite metadata)

Dockerfile

@@ -41,10 +41,10 @@ RUN pip install --no-cache-dir --force-reinstall \
 # CRITICAL: Re-install setuptools with pkg_resources AFTER TF downgrade.
 # The --force-reinstall above installs setuptools>=82 which removed pkg_resources,
 # but torchtnt (fairchem dep) needs it at runtime. Pin to <72 where it still exists.
-# Also fix numpy: fairchem-core 2.13.0 requires numpy>=2.0 but TF 2.15 pulled numpy 1.26.
-RUN pip install --no-cache-dir "setuptools<72" "numpy>=2.0,<2.4" && \
-    python -c "import pkg_resources; print('pkg_resources OK')" && \
-    python -c "import numpy; print(f'numpy {numpy.__version__}')"
+# Note: TF 2.15 pins numpy<2.0 (1.26.4), while fairchem-core 2.13 wants numpy>=2.0.
+# We keep numpy 1.26 (TF's pin) — fairchem works fine at runtime despite the metadata.
+RUN pip install --no-cache-dir "setuptools<72" && \
+    python -c "import pkg_resources; print('pkg_resources OK')"
 
 COPY . .