refactor(vault): Phase 3 — metadata convergence

- Backfill `created` frontmatter on 266 active notes (git date or mtime)
- Normalize `status` to 4 values: draft/active/done/archived (11 notes)
  - Active/进行中/needs-review → active
  - archive → archived
  - 待执行/conditional → draft
  - 完成/accepted → done
- Declare clipper boundary: 04_Archive/Inbox-Clippings/** exempt from migration
- Update depth rule: max 3 → max 4 levels (new notes only)
- Add metadata-converge.mjs script for reproducibility

03_Resources/Cooking/7 Low-Sodium Lunches Under 400 Calories.md

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+---
+created: 2026-01-05
+---
 **1. [SLOW COOKER CHICKEN ADOBO WITH PINEAPPLE](https://blog.myfitnesspal.com/slow-cooker-chicken-adobo-with-pineapple/) MYFITNESSPAL'S RECIPES**
 
 Nutrition (per serving): Calories: 340; Total Fat: 14g; Saturated

03_Resources/Cooking/CLAUDE.md

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+---
+created: 2026-01-26
+---
 <claude-mem-context>
 # Recent Activity
 

03_Resources/Cooking/Celery-Beef-Stir-Fry.md

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+---
+created: 2026-01-05
+---
 
 所需材料：
 

03_Resources/Cooking/Cooking.md

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+---
+created: 2026-01-05
+---
 ### Notes
 ```dataview
 table file.ctime as Date from "300-resources/Cooking"

03_Resources/Cooking/Easy Mini Quiche Recipe.md

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+---
+created: 2026-01-05
+---
 ## Ingredients   
 - 6 slices bread
 - 1/2 onion, grated

03_Resources/Cooking/番茄炒蛋升级版｜Ricky 教室.md

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+---
+created: 2026-08-25
+---
 # 
 
 > 核心做法：**先煮番茄酱汁，后炒蛋，再让蓬松鸡蛋吸满汤汁。**