fbt: Deterministic STARTUP order & additional checks (#4179)

* unit_tests: clear startup order

* fam: ensure unique STARTUP order

* fbt: warn on same .order values within a group leading to non-determinitic builds

* fbt: better formatting for app order warning

---------

Co-authored-by: hedger <hedger@nanode.su>

applications/services/expansion/application.fam

@@ -8,5 +8,5 @@ App(
     ],
     requires=["rpc_start"],
     provides=["expansion_settings"],
-    order=150,
+    order=100,
 )