fix(data): complete verified contracts and source maintenance (#114)

docs/data-sources/api-providers/brave.md

@@ -0,0 +1,55 @@
+# Brave Search API
+
+本轮读取失败，以下仅锁定现有待核合同，尚未证明字段有效。补官网正文并核实字段后再提升状态。
+
+数据区中的 claims 是复核边界，pending 字段是当前配置快照，不能当官方证明。enabled/priority/timeout 是产品策略，未复制到合同中。更新合同必须重新读官方正文、记录实际证明字段；结构校验不等于账号可用。
+
+<!-- data-source:start -->
+```json
+{
+  "kind": "api-contract",
+  "config": "api-providers/web-search/brave.json",
+  "checkedAt": "2026-10-03",
+  "status": "pending",
+  "sources": [
+    {
+      "url": "https://api.search.brave.com/app/documentation/web-search/get-started",
+      "retrieval": "failed",
+      "checkedAt": "2026-10-03",
+      "resolvedUrl": null,
+      "contentSha256": null,
+      "failure": "HTTP Error 403: Forbidden"
+    }
+  ],
+  "verifiedFields": [],
+  "claims": {
+    "endpoint": "https://api.search.brave.com/res/v1/web/search",
+    "method": "GET",
+    "auth": {
+      "type": "header",
+      "headerName": "X-Subscription-Token",
+      "apiKeyRef": "brave"
+    },
+    "request": {
+      "headers": {
+        "Accept": "application/json",
+        "Accept-Encoding": "gzip"
+      },
+      "queryParams": {
+        "q": "${query}",
+        "count": "${maxResults}"
+      }
+    },
+    "response": {
+      "resultsPath": "web.results",
+      "item": {
+        "titlePath": "title",
+        "urlPath": "url",
+        "snippetPath": "description",
+        "pageAgePath": "page_age"
+      }
+    }
+  }
+}
+```
+<!-- data-source:end -->