Force all API requests onto deepseek-v4-pro-search

Support DEEPSEEK_ACCOUNT4 secret

Support DEEPSEEK_ACCOUNT2 and DEEPSEEK_ACCOUNT3 secrets

Add streaming support for /v1/responses compatibility

Use stdlib HTTP proxy for /v1/responses compatibility

Add /v1/responses compatibility and collapse placeholder account

Persist bucket config as secret placeholders

Stop persisting DeepSeek secrets into bucket config

Fix health check fake request state binding

Route Space root to dashboard by default

Deploy DS2api Docker Space with bucket-backed runtime