Complete Yocto mirror with license table for TQMa6UL (2038-compliance)

- 264 license table entries with exact download URLs (224/264 resolved)
- Complete sources/ directory with all BitBake recipes
- Build configuration: tqma6ul-multi-mba6ulx, spaetzle (musl)
- Full traceability for Softwarefreigabeantrag
- GCC 13.4.0, Linux 6.6.102, U-Boot 2023.04, musl 1.2.4
- License distribution: GPL-2.0 (24), MIT (23), GPL-2.0+ (18), BSD-3 (16)

sources/poky/meta/classes/metadata_scm.bbclass

@@ -0,0 +1,10 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+METADATA_BRANCH := "${@oe.buildcfg.detect_branch(d)}"
+METADATA_BRANCH[vardepvalue] = "${METADATA_BRANCH}"
+METADATA_REVISION := "${@oe.buildcfg.detect_revision(d)}"
+METADATA_REVISION[vardepvalue] = "${METADATA_REVISION}"