feat: 迁移统一目录元数据契约 (#102)

## 中文

- 为 System Agent、34 个 Builtin Skill、28 个 Pointer/Collection 条目增加 catalog
sidecar
- 覆盖 147 个 collection child，并固定可证明的来源；无法证明的内容保持 listing-only/unknown
- 增加 strict Schema、validator、collection check 与 CI 完整性门禁

## English

- Add catalog metadata sidecars for the System Agent, 34 built-in
Skills, and 28 pointer/collection entries
- Cover 147 collection children while keeping unverifiable facts
listing-only or unknown
- Add strict schemas, validators, deterministic collection checks, and
CI completeness gates

## 验证 / Verification

- Catalog validator 17/17
- Collection generator 4/4
- 63 sidecars, 147 children, zero errors

scripts/i18n/test_validate_i18n.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env -S uv run --script
 # /// script
 # requires-python = ">=3.10"
-# dependencies = ["pyyaml>=6.0"]
+# dependencies = ["jsonschema>=4.23,<5", "pyyaml>=6.0"]
 # ///
 """Unit tests for market validation policies."""
 

scripts/i18n/validate-i18n.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env -S uv run --script
 # /// script
 # requires-python = ">=3.10"
-# dependencies = ["pyyaml>=6.0"]
+# dependencies = ["jsonschema>=4.23,<5", "pyyaml>=6.0"]
 # ///
 """Validate DesireCore market i18n state.
 
@@ -19,6 +19,7 @@ Checks:
   10. Skill, Agent, and entry.json category references exist in categories.json.
   11. entry.json pointers have the required marketplace fields, valid inline SVG icons, and safe source URLs.
   12. Market Skills set `disable-model-invocation` to true or omit it; false is prohibited.
+  13. Every catalog-metadata.v1.json sidecar passes the strict schema and legacy consistency checks.
 
 Exit codes:
   0 = pass
@@ -45,6 +46,12 @@ from typing import Any, Iterable
 from urllib.error import HTTPError, URLError
 from urllib.request import Request, urlopen
 
+CATALOG_SCRIPT_DIR = Path(__file__).resolve().parents[1] / "catalog"
+if str(CATALOG_SCRIPT_DIR) not in sys.path:
+    sys.path.insert(0, str(CATALOG_SCRIPT_DIR))
+
+from validate_catalog_metadata import validate_repository as validate_catalog_metadata_repository
+
 try:
     import yaml
 except ImportError:
@@ -586,6 +593,15 @@ def main(argv: list[str]) -> int:
     declared_locales, category_ids, manifest = validate_market_root(report)
     validate_market_catalog(report, manifest, category_ids, online=args.online)
 
+    catalog_report = validate_catalog_metadata_repository(REPO_ROOT)
+    for issue in catalog_report.issues:
+        report.add(Issue(
+            issue.path,
+            issue.rule,
+            issue.message,
+            severity=issue.severity,
+        ))
+
     if args.paths:
         targets = [Path(p).resolve() for p in args.paths]
     else: