fix(gateway): restore upstream account forwarding with dedicated methods

v0.1.74 merged upstream accounts into the OAuth path, causing requests to hit the wrong protocol and endpoint. Add three upstream-specific methods (testUpstreamConnection, ForwardUpstream, ForwardUpstreamGemini) that use base_url + apiKey auth and passthrough the original body, while reusing the existing response handling and error/retry logic.

fix(gateway): restore upstream account forwarding with dedicated methods
v0.1.74 merged upstream accounts into the OAuth path, causing requests to hit the wrong protocol and endpoint. Add three upstream-specific methods (testUpstreamConnection, ForwardUpstream, ForwardUpstreamGemini) that use base_url + apiKey auth and passthrough the original body, while reusing the existing response handling and error/retry logic.
77b66653 · erio · f3605ddc · 77b66653
Commit 77b66653 authored Feb 08, 2026 by erio
--- a/backend/internal/service/antigravity_gateway_service.go
+++ b/backend/internal/service/antigravity_gateway_service.go