chore: open-source release-prep (udev flag, SPDX headers, boolean style)

Three release cleanups, all behavior-preserving for my machines:

- Gated the Logitech BRIO udev rule behind INSTALL_DEVICE_UDEV_RULES (default yes, opt-out), so the device-specific rule is off for anyone without that hardware. Added the config read, validation, and a conf.example entry.
- Added a GPL-3.0-or-later SPDX-License-Identifier header after the shebang of all 24 shell scripts in the repo.
- Standardized boolean conditionals on the explicit [ "$var" = "true" ] form, replacing the bare `if $var` idiom. The STEPS function-dispatch is left alone, since it runs a function name rather than testing a boolean.

10 files changed, 10 insertions, 0 deletions

diff --git a/scripts/testing/cleanup-tests.sh b/scripts/testing/cleanup-tests.sh
index 5c0153b..390d7e5 100755
--- a/scripts/testing/cleanup-tests.sh
+++ b/scripts/testing/cleanup-tests.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Clean up old test VMs and artifacts
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/create-base-vm.sh b/scripts/testing/create-base-vm.sh
index 4ecf4d6..b8a4e2b 100755
--- a/scripts/testing/create-base-vm.sh
+++ b/scripts/testing/create-base-vm.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Create base VM for archsetup testing - Automated via Archangel ISO
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/debug-vm.sh b/scripts/testing/debug-vm.sh
index 32f377c..b0fa2b9 100755
--- a/scripts/testing/debug-vm.sh
+++ b/scripts/testing/debug-vm.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Launch VM for interactive debugging
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/lib/logging.sh b/scripts/testing/lib/logging.sh
index ed20707..809d396 100755
--- a/scripts/testing/lib/logging.sh
+++ b/scripts/testing/lib/logging.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Logging utilities for archsetup testing
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/lib/network-diagnostics.sh b/scripts/testing/lib/network-diagnostics.sh
index 674aeba..38788e5 100644
--- a/scripts/testing/lib/network-diagnostics.sh
+++ b/scripts/testing/lib/network-diagnostics.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Network diagnostics for VM testing
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/lib/validation.sh b/scripts/testing/lib/validation.sh
index 91270ef..6855da7 100644
--- a/scripts/testing/lib/validation.sh
+++ b/scripts/testing/lib/validation.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Validation utilities for archsetup testing
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/lib/vm-utils.sh b/scripts/testing/lib/vm-utils.sh
index a8736a3..d029d58 100755
--- a/scripts/testing/lib/vm-utils.sh
+++ b/scripts/testing/lib/vm-utils.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # VM management utilities for archsetup testing (direct QEMU)
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/run-test-baremetal.sh b/scripts/testing/run-test-baremetal.sh
index b6d1ab1..ae88316 100755
--- a/scripts/testing/run-test-baremetal.sh
+++ b/scripts/testing/run-test-baremetal.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Run archsetup test on bare metal ZFS system
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/run-test.sh b/scripts/testing/run-test.sh
index 5830ed9..9b47747 100755
--- a/scripts/testing/run-test.sh
+++ b/scripts/testing/run-test.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Run archsetup test in a VM using snapshots
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3
diff --git a/scripts/testing/setup-testing-env.sh b/scripts/testing/setup-testing-env.sh
index fb0628b..b5b584f 100755
--- a/scripts/testing/setup-testing-env.sh
+++ b/scripts/testing/setup-testing-env.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: GPL-3.0-or-later
 # Setup testing environment for archsetup
 # Author: Craig Jennings <craigmartinjennings@gmail.com>
 # License: GNU GPLv3