test(vm): switch to tahoe-base image and fix test-vm-quick target

- Update OCI image from macos-sequoia-base to macos-tahoe-base (already
  cached locally; sequoia image was not pulled)
- Fix test-vm-quick: was using -short which caused all VM tests to skip
  (they all check testing.Short()); now runs TestVM_Infra only (~20s)
- Remove deprecated test-vm-short alias

Author: fullstackjam

Makefile

@@ -42,10 +42,10 @@ test-all:
 # VM-based E2E tests (Tart VMs) — three levels
 # =============================================================================
 
-# L1: Quick validation (~5min) — run after code changes
-#     Uses -short flag: skips tests that install real packages
+# L1: Quick validation (~2min) — run after code changes
+#     Runs TestVM_Infra only: boots a VM and checks SSH/arch/tools, no package installs
 test-vm-quick: build
-	go test -v -timeout 10m -tags="e2e,vm" -short ./test/e2e/...
+	go test -v -timeout 5m -tags="e2e,vm" -run "TestVM_Infra" ./test/e2e/...
 
 # L2: Release validation (~20min) — run before tagging a release
 #     Core user journeys: dry-run safety, install + verify, diff/clean cycle,
@@ -62,7 +62,6 @@ test-vm-full: build
 
 # Aliases
 test-vm: test-vm-release
-test-vm-short: test-vm-quick
 
 # Single VM test by name (e.g. make test-vm-run TEST=TestVM_Journey_DryRun)
 test-vm-run: build

testutil/tartvm.go

@@ -13,7 +13,7 @@ import (
 )
 
 const (
-	ociImage       = "ghcr.io/cirruslabs/macos-sequoia-base:latest"
+	ociImage       = "ghcr.io/cirruslabs/macos-tahoe-base:latest"
 	vmUser         = "admin"
 	vmPassword     = "admin"
 	vmPrefix       = "openboot-e2e-"