docs: pin tinystruct-patterns frontmatter to upstream framework version

Add metadata.upstream: tinystruct==1.7.34 to both the English skill and
its Japanese translation, so a future sync can mechanically diff the
pinned version against the current tinystruct release instead of
rediscovering drift from prose. Also migrates the legacy top-level
`origin: ECC` key into the metadata block, matching the schema used by
the rest of the skills in this repo (tests/commands/learn-skill-discovery.test.js
already asserts top-level `origin:` is unsupported).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/ja-JP/skills/tinystruct-patterns/SKILL.md

@@ -1,7 +1,9 @@
 ---
 name: tinystruct-patterns
 description: tinystruct Java フレームワークで開発する際の専門ガイダンス。tinystruct コードベース、または tinystruct 上に構築されたあらゆるプロジェクトで作業する際に使用します — プロジェクトに存在しない場合の bin/dispatcher・bin/dispatcher.cmd 起動スクリプトの生成、Application クラスの作成、@Action によるルート定義、ユニットテスト、ActionRegistry、HTTP/CLI デュアルモード対応、組み込み HTTP サーバー、イベントシステム、Builder/Builders による JSON 処理、AbstractData によるデータベース永続化、POJO 生成、Server-Sent Events (SSE)、ファイルアップロード、アウトバウンド HTTP 通信を含みます。
-origin: ECC
+metadata:
+  origin: ECC
+  upstream: tinystruct==1.7.34
 ---
 
 # tinystruct 開発パターン

skills/tinystruct-patterns/SKILL.md

@@ -1,7 +1,9 @@
 ---
 name: tinystruct-patterns
 description: Expert guidance for developing with the tinystruct Java framework. Use when working on the tinystruct codebase or any project built on tinystruct — including generating the bin/dispatcher and bin/dispatcher.cmd launcher scripts when a project lacks them, creating Application classes, @Action-mapped routes, unit tests, ActionRegistry, HTTP/CLI dual-mode handling, the built-in HTTP server, the event system, JSON with Builder/Builders, database persistence with AbstractData, POJO generation, Server-Sent Events (SSE), file uploads, and outbound HTTP networking.
-origin: ECC
+metadata:
+  origin: ECC
+  upstream: tinystruct==1.7.34
 ---
 
 # tinystruct Development Patterns