docs(tools): tighten the heading-wrap changelog, comments and overview

changelog.d/1524-tools-heading-wrap.md

@@ -1,4 +1,3 @@
-- The agent and voice query tools report a direction that rounds to 360 as 0:
-  vessel course and heading, aircraft course, transit bearing, camera heading
-  and satellite azimuths now round through the shared heading helper the
-  layers use, which wraps into 0–359 (@quanticsoul4772, #1524).
+- The agent and voice query tools wrap whole-degree directions into 0–359, so
+  a vessel course or heading, aircraft course, transit bearing, camera heading
+  or satellite azimuth that rounds to 360 reads 0 (@quanticsoul4772, #1524).