fix(deploy): also exclude .venv from the rsync payload

reticulum-daemon/.venv (a local Python virtualenv bundling PyInstaller +
esptool + Qt hooks, several hundred MB) was also being synced to deploy
targets uncached -- same class of bug as the releases/ exclude just added.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scripts/deploy-to-target.sh

@@ -556,6 +556,7 @@ rsync -avz --delete \
     --exclude 'image-recipe/_archived/build' \
     --exclude 'image-recipe/_archived/results' \
     --exclude 'releases' \
+    --exclude '.venv' \
     "$PROJECT_DIR/" "$TARGET_HOST:$TARGET_DIR/"
 section_end