README: note the pruned tree and the new ctest Not Run baseline

The pruned tree no longer registers the out-of-scope ctest entries; the
expected baseline is now 7 in-scope tests passed + 3 Not Run
(nglcomp_test, GrantleeParserSmoke, utils_test).

Verified with a full pipeline run on the pruned tree: 46/46 targets
built, ctest 7/7 in-scope passed, 5 DEBs produced.

qt6-after/qt6-migrated-legatus/README.md

@@ -3,6 +3,11 @@
 Build guide for the Qt6-migrated legatus tree for **Release 2** (guez project).
 Everything runs inside a prebuilt Docker image; the host only needs Docker.
 
+The source tree on this branch is pruned to the Release 2 build closure:
+only the modules the 46 scope targets compile (plus their transitive
+service dependencies, the codegen inputs, and the build-pipeline files)
+are present — out-of-scope modules have been removed.
+
 ## Release 2 Scope
 
 **46 targets** across 4 build groups (GROUP1, GROUP3, GROUP5, GROUP6):
@@ -136,11 +141,11 @@ Expected baseline (7 in-scope tests, all passed):
 | 6 | `lts_coord_trans_unit_test` | Passed |
 | 7 | `aes_crypt_test` | Passed |
 
-Tests registered by out-of-scope modules show up as `***Not Run`
-(`nglcomp_test`, `ddsGenericDataTests`, `ddsDataTopicTests`,
-`ddsFunctionTopicTests`, `coordTransTests_gtest`, `GrantleeParserSmoke`,
-`utils_test`, `exmDtUnitTest`, `migration_tests_NOT_BUILT`) — that is expected
-and the driver continues.
+A few tests registered by in-scope CMakeLists are not part of the 46
+built targets and show up as `***Not Run` (`nglcomp_test`,
+`GrantleeParserSmoke`, `utils_test`) — that is expected and the driver
+continues. (Out-of-scope modules were pruned from this branch, so the
+tests they registered are gone with them.)
 
 ### 2.2 Build the unit tests only