force each container's unit configs in the checks about it

nix/module-eval/bao-otel-collector.nix

@@ -21,6 +21,7 @@ let
     hive
     runGroup
     baoSettings
+    forceServiceConfigs
     ;
 
   baoTwoAddresses = hive {
@@ -75,6 +76,12 @@ let
   scrapeJob = scrapeJobIn "swarm-otel";
   baoScrapeJob = scrapeJobIn "swarm-bao";
   cases = [
+    {
+      # Every unit in the container merges without a priority collision, not
+      # only the keys the cases here read.
+      name = "the store's container units merge without a priority collision";
+      ok = forceServiceConfigs baoWithCollector.containers.swarm-bao.config;
+    }
     {
       # Same gap one tier up, and it needs its own arm: this collector
       # already had six scrape targets, so a pass here is about the seventh