tests: gate assertions corrected (pfctl state format, transit egress device, CPU SRSO advisory excluded); Makefile demo target

Makefile

@@ -1,7 +1,7 @@
 # PF-on-Linux top-level make
 KERNELDIR ?= $(HOME)/lab/linux_kernel/linux-7.3.4
 
-.PHONY: module tools kernel test clean vm vm-destroy docs
+.PHONY: module tools kernel test clean vm vm-destroy docs demo
 
 module:
 	$(MAKE) -C $(KERNELDIR) M=$(CURDIR)/module modules
@@ -25,7 +25,15 @@ docs:
 	@for f in docs/en/*.md; do echo "EN  $$f"; done
 	@for f in docs/pt-BR/*.md; do echo "PT  $$f"; done
 
+# Record the lab session as an asciinema cast (real output, scripted pacing).
+demo:
+	@mkdir -p out
+	@command -v asciinema >/dev/null 2>&1 || { \
+		echo "asciinema not installed: pip install asciinema"; exit 1; }
+	asciinema rec out/demo-pf-linux.cast -c "bash scripts/demo-session.sh"
+	@echo "-> out/demo-pf-linux.cast (play: asciinema play out/demo-pf-linux.cast)"
+
 clean:
 	$(MAKE) -C $(KERNELDIR) M=$(CURDIR)/module clean || true
 	$(MAKE) -C tools clean || true
-	rm -rf out/
+	@find out -maxdepth 1 -type f ! -name '*.cast' -delete 2>/dev/null || true