feat: wire SQLite replication between site nodes and fix ConfigurationDatabase tests

Add SiteReplicationActor (runs on every site node) to replicate deployed
configs and store-and-forward buffer operations to the standby peer via
cluster member discovery and fire-and-forget Tell. Wire ReplicationService
handler and pass replication actor to DeploymentManagerActor singleton.

Fix 5 pre-existing ConfigurationDatabase test failures: RowVersion NOT NULL
on SQLite, stale migration name assertion, and seed data count mismatch.

src/ScadaLink.SiteRuntime/Actors/ScriptActor.cs

@@ -261,6 +261,7 @@ public class ScriptActor : ReceiveActor, IWithTimers
             "interval" => ParseIntervalTrigger(triggerConfigJson),
             "valuechange" => ParseValueChangeTrigger(triggerConfigJson),
             "conditional" => ParseConditionalTrigger(triggerConfigJson),
+            "call" => null, // No automatic trigger — invoked only via Instance.CallScript()
             _ => null
         };
     }