fix(hub): raise Docmind OSS upload timeout past httpx 3s default

SubmitDocParserJobAdvance uploads PDFs to Aliyun OSS via tea/httpx, which
defaults readTimeout to 3000ms when RuntimeOptions is empty. Multi-MB
teacher PDFs on para silo failed with ReadTimeout(3000) before the job
could start. Set connectTimeout=15s and readTimeout=5m.

hub/src/capability/docmindClient.ts

@@ -62,6 +62,23 @@ export class DocmindClientError extends Error {
 const COST_PER_PAGE_USD = 0.0056;
 const POLL_INTERVAL_MS = 10_000;
 const POLL_TIMEOUT_MS = 5 * 60_000;
+/**
+ * httpx (tea transport) defaults read/connect timeout to 3000ms when unset.
+ * SubmitDocParserJobAdvance uploads the PDF to OSS; multi-MB files routinely
+ * exceed 3s on the silo host (production: ReadTimeout(3000) on
+ * docmind-api-cn-hangzhou.oss-cn-hangzhou.aliyuncs.com).
+ */
+export const DOCMIND_CONNECT_TIMEOUT_MS = 15_000;
+/** Allow slow / large PDF OSS uploads up to the same bound as job polling. */
+export const DOCMIND_READ_TIMEOUT_MS = POLL_TIMEOUT_MS;
+
+/** RuntimeOptions for Docmind SDK calls that may upload or wait on the wire. */
+export function createDocmindRuntimeOptions(): RuntimeOptions {
+  return new RuntimeOptions({
+    connectTimeout: DOCMIND_CONNECT_TIMEOUT_MS,
+    readTimeout: DOCMIND_READ_TIMEOUT_MS,
+  });
+}
 
 type DocmindConfig = ConstructorParameters<typeof $DocmindClient.default>[0];
 
@@ -90,7 +107,7 @@ export class AliyunDocmindClient implements CapabilityProviderClient {
       outputFormat: ["markdown"],
       formulaEnhancement: true,
     });
-    const runtime = new RuntimeOptions({});
+    const runtime = createDocmindRuntimeOptions();
     let submitResponse;
     try {
       submitResponse = await client.submitDocParserJobAdvance(advanceRequest, runtime);