fix(ci): retry nightly cargo downloads

- 延长 Cargo 索引请求超时并增加网络重试
- 添加 Nightly Sophon workflow 回归测试

Signed-off-by: Fernandez <yuanhaon81@gmail.com>

Author: Fernandez81

.github/workflows/nightly-build-test-sophon.yml

@@ -22,6 +22,10 @@ jobs:
       candidate_tests_sha256: ${{ steps.candidate_test_binary.outputs.sha256 }}
     env:
       COSMO_MODEL_GUARD_BUILD_PROFILE: public-runtime
+      # Cargo defaults each HTTP request to 30 seconds and only three retries.
+      # The public rsproxy sparse index can exceed that from GitHub runners.
+      CARGO_HTTP_TIMEOUT: "120"
+      CARGO_NET_RETRY: "5"
 
     # Specify the public container image for the build environment
     container:

test/test_package_profile.py

@@ -167,6 +167,17 @@ def test_nightly_sophon_container_build_uses_bash(self) -> None:
         self.assertIn("    defaults:\n      run:\n        shell: bash\n", build_job)
         self.assertIn("set -euo pipefail", build_job)
 
+    def test_nightly_sophon_build_retries_cargo_downloads(self) -> None:
+        workflow = (
+            REPOSITORY / ".github/workflows/nightly-build-test-sophon.yml"
+        ).read_text(encoding="utf-8")
+        build_job = workflow.split("  build-sophon:", 1)[1].split(
+            "\n  test-sophon:", 1
+        )[0]
+
+        self.assertIn('CARGO_HTTP_TIMEOUT: "120"', build_job)
+        self.assertIn('CARGO_NET_RETRY: "5"', build_job)
+
     def test_container_builds_bound_and_cache_npm_connections(self) -> None:
         npmrc = (REPOSITORY / "src/web/.npmrc").read_text(encoding="utf-8")
         self.assertIn("registry=https://registry.npmmirror.com/", npmrc)