refactor(cli, ups-handler, daemon, migrations): remove thresholds handling and update migration order logic

ts/migrations/base-migration.ts

@@ -5,16 +5,14 @@
  * Migrations run in order based on the `order` field, allowing users to jump
  * multiple versions (e.g., v1 → v4 runs migrations 2, 3, and 4).
  */
+/**
+ * Abstract base class for configuration migrations
+ *
+ * Each migration represents an upgrade from one config version to another.
+ * Migrations run in order based on the `toVersion` field, allowing users to jump
+ * multiple versions (e.g., v1 → v4 runs migrations 2, 3, and 4).
+ */
 export abstract class BaseMigration {
-  /**
-   * Migration order number
-   * - Order 2: v1 → v2
-   * - Order 3: v2 → v3
-   * - Order 4: v3 → v4
-   * etc.
-   */
-  abstract readonly order: number;
-
   /**
    * Source version this migration upgrades from
    * e.g., "1.x", "3.x"
@@ -23,7 +21,7 @@ export abstract class BaseMigration {
 
   /**
    * Target version this migration upgrades to
-   * e.g., "2.0", "4.0"
+   * e.g., "2.0", "4.0", "4.1"
    */
   abstract readonly toVersion: string;
 
@@ -51,4 +49,19 @@ export abstract class BaseMigration {
   getName(): string {
     return `Migration ${this.fromVersion} → ${this.toVersion}`;
   }
+
+  /**
+   * Parse version string into a comparable number
+   * Supports formats like "2.0", "4.1", etc.
+   * Returns a number like 2.0, 4.1 for sorting
+   *
+   * @returns Parsed version number for ordering
+   */
+  getVersionOrder(): number {
+    const parsed = parseFloat(this.toVersion);
+    if (isNaN(parsed)) {
+      throw new Error(`Invalid version format: ${this.toVersion}`);
+    }
+    return parsed;
+  }
 }