Fix numpy downgrade for SAM 3 compatibility

Author: fcladera

Dockerfile

@@ -53,12 +53,14 @@ RUN pip install --no-cache-dir \
         torch torchvision torchaudio \
         --index-url https://download.pytorch.org/whl/cu126
 
-# Downgrade numpy before SAM 3 (SAM 3 requires numpy<2, pip can't uninstall numpy 2.x cleanly)
-RUN pip install --no-cache-dir --ignore-installed "numpy>=1.26,<2"
+# Downgrade numpy before SAM 3 (SAM 3 requires numpy<2, pip can't uninstall numpy 2.x in-place)
+RUN rm -rf $(python3 -c "import numpy; import os; print(os.path.dirname(numpy.__file__))") \
+    && rm -rf /opt/venv/lib/python3.12/site-packages/numpy*.dist-info \
+    && pip install --no-cache-dir "numpy>=1.26,<2"
 
 # SAM 3
 RUN git clone https://github.com/facebookresearch/sam3.git /opt/sam3 \
-    && pip install --no-cache-dir --no-deps -e /opt/sam3
+    && pip install --no-cache-dir -e /opt/sam3
 
 # Remaining python deps (opencv pinned <4.11 for numpy 1.x compat)
 RUN pip install --no-cache-dir \