refactor(proxy): use settings for upstream base; integrate new pricing flow and header prep

routstr/proxy.py

@@ -15,8 +15,8 @@ from .auth import (
 )
 from .core import get_logger
 from .core.db import ApiKey, AsyncSession, create_session, get_session
+from .core.settings import settings
 from .payment.helpers import (
-    UPSTREAM_BASE_URL,
     check_token_balance,
     create_error_response,
     get_max_cost_for_model,
@@ -307,7 +307,7 @@ async def forward_to_upstream(
     if path.startswith("v1/"):
         path = path.replace("v1/", "")
 
-    url = f"{UPSTREAM_BASE_URL}/{path}"
+    url = f"{settings.upstream_base_url}/{path}"
 
     logger.info(
         "Forwarding request to upstream",
@@ -756,7 +756,7 @@ async def forward_get_to_upstream(
     if path.startswith("v1/"):
         path = path.replace("v1/", "")
 
-    url = f"{UPSTREAM_BASE_URL}/{path}"
+    url = f"{settings.upstream_base_url}/{path}"
 
     logger.info(
         "Forwarding GET request to upstream",