♻️ Rename the overlay suites to the relation vocabulary

The three test namespaces still carried graph-overlay in their
names and files. They are backend-tests.relation-overlay-test,
-sync-test, and -console-test now, so the branch carries no old
holder name outside dated records and the storage literal.

AI-assisted-by: glm-5.3-flash
Signed-off-by: Álvaro Tejero Cantero <alvorithm@teje.ro>

backend/src/app/graph/relation_overlay.clj

@@ -626,7 +626,7 @@
   The two paths produce the same graph. Entity ids differ and carry no
   meaning, and the datom set is identical once every id is read back
   through the tempid that minted it, which
-  `backend-tests.graph-overlay-test` asserts."
+  `backend-tests.relation-overlay-test` asserts."
   ([data] (build data nil))
   ([data file]
    (d/init-db (build-datoms data file) schema)))

backend/test/backend_tests/relation_overlay_console_test.clj

@@ -4,7 +4,7 @@
 ;;
 ;; Copyright (c) KALEIDOS INC Sucursal en España SL
 
-(ns backend-tests.graph-overlay-console-test
+(ns backend-tests.relation-overlay-console-test
   "Pure tests over the console's parse-gate-run pipeline
   (`app.graph.relation-overlay.console/run-query`) and the default query it ships
   (`app.graph.debug/default-query`).

backend/test/backend_tests/relation_overlay_sync_test.clj

@@ -4,7 +4,7 @@
 ;;
 ;; Copyright (c) KALEIDOS INC Sucursal en España SL
 
-(ns backend-tests.graph-overlay-sync-test
+(ns backend-tests.relation-overlay-sync-test
   "Cold build and incremental sync are two implementations of one mapping,
   and this namespace holds them to it.
 

backend/test/backend_tests/relation_overlay_test.clj

@@ -4,7 +4,7 @@
 ;;
 ;; Copyright (c) KALEIDOS INC Sucursal en España SL
 
-(ns backend-tests.graph-overlay-test
+(ns backend-tests.relation-overlay-test
   "The semantic suite of the datascript graph overlay: the beadpot graph
   test suite (beadpot:tests/graph/transform) ported from Cypher to
   Datalog, one fixture file.