feat: Multi-region stagehand api support

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 8
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fstagehand-5d0052068f044366d6d31570d9712922c9a80fdd6f9995af815e9afc075507ef.yml
-openapi_spec_hash: c0cb787da075d8cd2d938c05b36b5efa
-config_hash: 4252fc025e947bc0fd6b2abd91a0cc8e
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fstagehand-6fd391f729eb05dc7b6168adff89e6198bc545ebd4ff737494d72288870e0977.yml
+openapi_spec_hash: ee16862542659f47acc8dcd5669c7623
+config_hash: 7386d24e2f03a3b2a89b3f6881446348

buildSrc/src/main/kotlin/stagehand.publish.gradle.kts

@@ -43,7 +43,7 @@ configure<MavenPublishBaseExtension> {
 
     pom {
         name.set("Stagehand API")
-        description.set("Stagehand SDK for AI browser automation [ALPHA]. This API allows clients to\nexecute browser automation tasks remotely on the Browserbase cloud.\n\nAll endpoints except /sessions/start require an active session ID. Responses are\nstreamed using Server-Sent Events (SSE) when the `x-stream-response: true`\nheader is provided.\n\nThis SDK is currently ALPHA software and is not production ready! Please try it\nand give us your feedback, stay tuned for upcoming release announcements!")
+        description.set("Stagehand SDK for AI browser automation [ALPHA]. This API allows clients to\nexecute browser automation tasks remotely on the Browserbase cloud.\n\n## Multi-Region Support\n\nThe Stagehand API is available in multiple regions. Choose the API endpoint that\nmatches where your browser session is running:\n\n| Region              | Endpoint                                    |\n| ------------------- | ------------------------------------------- |\n| us-west-2 (default) | https://api.stagehand.browserbase.com       |\n| us-east-1           | https://api.use1.stagehand.browserbase.com  |\n| eu-central-1        | https://api.euc1.stagehand.browserbase.com  |\n| ap-southeast-1      | https://api.apse1.stagehand.browserbase.com |\n\n**Important:** The API endpoint must match your browser session region. If\nthere's a mismatch, you'll receive a BAD_REQUEST error:\n`Session is in region 'X' but this API instance serves 'Y'. Please route your request to the X Stagehand API endpoint.`\n\nTo disable API mode and use local browser automation, set `disableAPI: true` in\nyour Stagehand configuration.\n\n## Authentication and Usage\n\nAll endpoints except /sessions/start require an active session ID. Responses are\nstreamed using Server-Sent Events (SSE) when the `x-stream-response: true`\nheader is provided.\n\nThis SDK is currently ALPHA software and is not production ready! Please try it\nand give us your feedback, stay tuned for upcoming release announcements!")
         url.set("https://docs.stagehand.dev")
 
         licenses {