fix: normalize task IDs to numbers on load to fix comparison issues

- Added normalizeTaskIds function to convert string IDs to numbers
- Applied normalization in readJSON for all code paths
- Fixed set-task-status, add-task, and move-task to normalize IDs when working with raw data
- Exported normalizeTaskIds function for use in other modules
- Added test case for string ID normalization

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/modules/task-manager/move-task.js

@@ -1,5 +1,5 @@
 import path from 'path';
-import { log, readJSON, writeJSON, setTasksForTag } from '../utils.js';
+import { log, readJSON, writeJSON, setTasksForTag, normalizeTaskIds } from '../utils.js';
 import { isTaskDependentOn } from '../task-manager.js';
 import generateTaskFiles from './generate-task-files.js';
 
@@ -79,6 +79,8 @@ async function moveTask(
 
 	// Get the tasks for the current tag
 	const tasks = rawData[tag].tasks;
+	
+	normalizeTaskIds(tasks);
 
 	log(
 		'info',