chore(release): bump version to 4.2.3

The migration was correct as v4.0→v4.1. Config version goes from 4.0 to 4.1
when thresholds are moved to actions. The original error was not the migration
but the ups-handler.ts bug (already fixed in v4.2.1).

User's config shows version "4.1" with actions already present, confirming
the migration ran successfully.

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@serve.zone/nupst",
-  "version": "4.2.1",
+  "version": "4.2.3",
   "exports": "./mod.ts",
   "tasks": {
     "dev": "deno run --allow-all mod.ts",

ts/migrations/migration-runner.ts

@@ -19,7 +19,7 @@ export class MigrationRunner {
       new MigrationV1ToV2(),
       new MigrationV3ToV4(),
       new MigrationV4_0ToV4_1(),
-      // Add future migrations here (v4.2, v4.3, etc.)
+      // Add future migrations here (v4.3, v4.4, etc.)
     ];
 
     // Sort by version order to ensure they run in sequence

ts/migrations/migration-v4.0-to-v4.1.ts

@@ -10,7 +10,7 @@ import { logger } from '../logger.ts';
  * 3. Adds empty actions array to UPS devices without actions
  * 4. Adds empty actions array to groups
  *
- * Transforms v4.0 format:
+ * Transforms v4.0 format (with UPS-level thresholds):
  * {
  *   version: "4.0",
  *   upsDevices: [
@@ -24,7 +24,7 @@ import { logger } from '../logger.ts';
  *   ]
  * }
  *
- * To v4.1 format:
+ * To v4.1 format (with action-level thresholds):
  * {
  *   version: "4.1",
  *   upsDevices: [
@@ -37,7 +37,7 @@ import { logger } from '../logger.ts';
  *         {
  *           type: "shutdown",
  *           thresholds: { battery: 60, runtime: 20 },
- *           onlyOnThresholdViolation: true,
+ *           triggerMode: "onlyThresholds",
  *           shutdownDelay: 5
  *         }
  *       ]
@@ -50,7 +50,7 @@ export class MigrationV4_0ToV4_1 extends BaseMigration {
   readonly toVersion = '4.1';
 
   async shouldRun(config: any): Promise<boolean> {
-    // Run if config is version 4.0 or missing version with v4 structure
+    // Run if config is version 4.0
     if (config.version === '4.0') {
       return true;
     }
@@ -59,7 +59,7 @@ export class MigrationV4_0ToV4_1 extends BaseMigration {
     if (config.upsDevices && config.upsDevices.length > 0) {
       const firstDevice = config.upsDevices[0];
       // v4.0 has thresholds at UPS level, v4.1 has them in actions
-      return firstDevice.thresholds !== undefined && firstDevice.actions === undefined;
+      return firstDevice.thresholds !== undefined;
     }
 
     return false;