feat: add H3 transport infrastructure, sandbox URL resolution, and header refresh

pyproject.toml

@@ -24,6 +24,9 @@ dependencies = [
 # Core functionality (always include blaxel.core dependencies)
 core = []
 
+# HTTP/3 (QUIC) transport support
+h3 = ["aioquic>=1.2.0"]
+
 # Telemetry module
 telemetry = [
   "opentelemetry-exporter-otlp>=1.28.0",

src/blaxel/core/common/autoload.py

@@ -22,9 +22,6 @@ def autoload() -> None:
     client.with_base_url(settings.base_url)
     client.with_auth(settings.auth)
 
-    # Register response interceptors for authentication error handling
-    # Access the underlying httpx clients and add event hooks
-    # Use sync interceptors for sync clients and async interceptors for async clients
     httpx_client = client.get_httpx_client()
     httpx_client.event_hooks["response"] = response_interceptors_sync