fix(e2e): move session cleanup after Phase 19

Session was being stopped/deleted at end of Phase 15, but Phase 19
tests sub-resource access on the same session. Move cleanup to after
Phase 19 completes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jsell-rh

components/ambient-api-server/test/e2e/rbac_e2e_test.sh

@@ -1141,11 +1141,6 @@ if [[ -n "$SESSION_A_ID" ]]; then
   # User C (no bindings) cannot access session -> 404
   api GET "/sessions/${SESSION_A_ID}" "$TOKEN_C"
   assert_status "404" "$HTTP_STATUS" "User C GET session returns 404 (no bindings)"
-
-  # Clean up: stop and delete the session
-  api POST "/sessions/${SESSION_A_ID}/stop" "$TOKEN_A" '{}'
-  api DELETE "/sessions/${SESSION_A_ID}" "$TOKEN_A"
-  echo "  Cleaned up test session ${SESSION_A_ID}"
 fi
 
 # ============================================================
@@ -1248,6 +1243,13 @@ if [[ -n "$SESSION_A_ID" ]]; then
   done
 fi
 
+# Clean up test session (after Phase 19 uses it)
+if [[ -n "$SESSION_A_ID" ]]; then
+  api POST "/sessions/${SESSION_A_ID}/stop" "$TOKEN_A" '{}'
+  api DELETE "/sessions/${SESSION_A_ID}" "$TOKEN_A"
+  echo "  Cleaned up test session ${SESSION_A_ID}"
+fi
+
 # ============================================================
 echo ""
 echo -e "${BOLD}Phase 20: Scheduled Sessions RBAC${NC}"