docs(triggers): list the Expression config shape in the codec summaries

src/ScadaLink.CentralUI/Components/Shared/AlarmTriggerConfigCodec.cs

@@ -15,6 +15,7 @@ namespace ScadaLink.CentralUI.Components.Shared;
 ///   RateOfChange     { attributeName, thresholdPerSecond, windowSeconds, direction }
 ///   HiLo             { attributeName, loLo, lo, hi, hiHi,
 ///                      loLoPriority, loPriority, hiPriority, hiHiPriority }
+///   Expression       { expression }
 ///
 /// All HiLo setpoints and per-setpoint priorities are optional — any subset
 /// is valid (e.g., only Hi/HiHi configured for over-temperature protection).

src/ScadaLink.CentralUI/Components/Shared/ScriptTriggerConfigCodec.cs

@@ -43,6 +43,7 @@ internal sealed class ScriptTriggerModel
 ///   ValueChange  { attributeName }
 ///   Conditional  { attributeName, operator, threshold }
 ///   Call         { }
+///   Expression   { expression }
 ///
 /// Parsing also accepts the legacy aliases <c>attribute</c> and <c>value</c> so
 /// older configs survive a round-trip through the editor.