fix(flow-debugger): final-review remediation — 2000-row trace pull, shared ExceptionHeader parser, surrogate-safe clip, wording, alarm source, register renumber (I1/I2/M1-M8)

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Scripts/ScriptRunLauncher.cs

@@ -432,7 +432,8 @@ internal static class ScriptRunLauncher
             var state = await compiledScript.RunAsync(globals, cts.Token);
 
             // Step logs (design D7): close the run's log BEFORE the anchor row, so the closing
-            // "N line(s) dropped" row precedes the ScriptRun in emission order on every path.
+            // "log line cap reached - N further log line(s)…" row precedes the ScriptRun in
+            // emission order on every path.
             context.Log.FlushDropped();
 
             // Flow Debugger: the ScriptRun row goes into the collector BEFORE the reply so the
@@ -705,6 +706,12 @@ internal static class ScriptRunLauncher
                 timeout,
                 instanceName,
                 logger,
+                // Final review M6: name the source so ScriptRuntimeContext's `_logTarget` derives
+                // the alarm this on-trigger run belongs to ("AlarmActor:Foo" -> "Foo") — without
+                // it every Log.* line from an alarm script was attributed to the INSTANCE, not the
+                // alarm. `scriptName` above is already the "AlarmActor:{alarmName}" source key, so
+                // it is passed as-is (re-prefixing it would leave "AlarmActor:" in the target).
+                sourceScript: scriptName,
                 // ParentExecutionId tag-cascade: the
                 // alarm on-trigger run mints its own fresh ExecutionId (the
                 // ctor's `?? NewGuid()` fallback) and records the firing