DEVX-151: perf: skip dep resolution in setup-image with --no-deps

Makefile

@@ -66,7 +66,7 @@ setup-release: $(VENV)/bin/activate .env
 # an older devx.mak that doesn't yet define devx-setup-image. Consumer repos
 # (grm, infra) can safely alias to devx-setup-image since they install devx from PyPI.
 setup-image:
-	@if [ -d /opt/venv ]; then ln -sf /opt/venv $(VENV); . $(VENV)/bin/activate && pip install --no-cache-dir -e . 2>/dev/null; \
+	@if [ -d /opt/venv ]; then ln -sf /opt/venv $(VENV); . $(VENV)/bin/activate && pip install --no-cache-dir --no-deps -e . 2>/dev/null; \
 	else echo "[setup-image] /opt/venv not found — falling back to setup-ci"; $(MAKE) setup-ci; fi
 
 install-hooks: