Code Upload Worker: Fix code upload worker image build on Python 3.9(#5105)

Pin requests to 2.32.5 because 2.33.0 requires Python 3.10+, and split the
Dockerfile pip/cleanup steps so pip install failures are not masked by || true
or a failing cache-mount rm.

Author: RishabhJain2018

docker/prod/code-upload-worker/Dockerfile

@@ -20,10 +20,10 @@ COPY requirements/ /code/requirements/
 
 # Install Python dependencies with BuildKit cache mount
 RUN --mount=type=cache,target=/root/.cache/pip \
-    pip install --no-cache-dir --no-compile -r requirements/code_upload_worker.txt && \
-    # Clean up pip cache and Python bytecode (directories first, then files)
-    rm -rf /root/.cache/pip && \
-    find /usr/local/lib/python3.9/site-packages -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true && \
+    pip install --no-cache-dir --no-compile -r requirements/code_upload_worker.txt
+
+# Best-effort bytecode cleanup; keep separate so pip failures fail the build.
+RUN find /usr/local/lib/python3.9/site-packages -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true && \
     find /usr/local/lib/python3.9/site-packages \( -name "*.pyc" -o -name "*.pyo" \) -delete 2>/dev/null || true
 
 # Stage 2: Minimal runtime stage (needs shell for install script, so can't use distroless)

requirements/code_upload_worker.txt

@@ -1,3 +1,3 @@
 kubernetes==12.0.1
 PyYaml==5.4.1
-requests==2.33.0
+requests==2.32.5