feat(flow-debugger): carry site-side trace truncation on the route reply (ScadaBridge#54)

ScriptCallResult and RouteToCallResponse gain trailing Truncated/LogsTruncated,
filled from the site FlowTraceCollector after Complete(); RouteToCallResponseDto
fields 8/9 carry them (sitecommand regen). FlowDebugRunner ORs them into
FlowDebugRunResult on the script entry, and on the method entry through a new
optional truncation sink on RouteHelper.WithTraceSink (carried through every
With* clone). Previously a site run whose collector dropped rows came back as a
silently short list. Older sites send false.

Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV

tests/ZB.MOM.WW.ScadaBridge.Communication.Tests/SiteCommandSamples.cs

@@ -203,7 +203,10 @@ internal static class SiteCommandSamples
 
         // ── Route replies ──
         Add(new RouteToCallResponse("corr-12", true, 17L, null, T1, G1, TraceSamples()),
-            new RouteToCallResponse("corr-12", false, null, "script faulted", T2));
+            new RouteToCallResponse("corr-12", false, null, "script faulted", T2),
+            // Gitea #54: fields 8/9 — the site collector's truncation flags.
+            new RouteToCallResponse("corr-12", true, 17L, null, T1, G1, TraceSamples(), Truncated: true, LogsTruncated: false),
+            new RouteToCallResponse("corr-12", true, 17L, null, T1, G1, TraceSamples(), Truncated: false, LogsTruncated: true));
         Add(new RouteToGetAttributesResponse("corr-13", Parameters(), true, null, T1),
             new RouteToGetAttributesResponse("corr-13", new Dictionary<string, object?>(), false, "no instance", T2));
         Add(new RouteToSetAttributesResponse("corr-14", true, null, T1),