perf(site-call-audit): OPTION (RECOMPILE) on the optional-parameter query page

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/SiteCallAuditRepository.cs

@@ -226,7 +226,14 @@ WHERE ({filter.Channel} IS NULL OR Channel = {filter.Channel})
   AND ({(hasCursor ? 1 : 0)} = 0
        OR CreatedAtUtc < {afterCreated}
        OR (CreatedAtUtc = {afterCreated} AND TrackedOperationId < {afterIdString}))
-ORDER BY CreatedAtUtc DESC, TrackedOperationId DESC;";
+ORDER BY CreatedAtUtc DESC, TrackedOperationId DESC
+-- Every filter above is the (@p IS NULL OR col = @p) optional-parameter shape, so a
+-- single cached plan would be parameter-sniffed for whichever filters happened to be
+-- non-null on first compile. RECOMPILE lets the optimizer prune the dead (@p IS NULL)
+-- predicates per invocation and pick IX_SiteCalls_Status_Updated / IX_SiteCalls_NonTerminal
+-- for the filters actually supplied (arch-review 04, P5). Per-invocation compile cost is
+-- negligible at UI-page cadence.
+OPTION (RECOMPILE);";
 
         var rows = await _context.Set<SiteCall>()
             .FromSqlInterpolated(sql)