fix: recover failed Gaussian project builds

tests/test_gaussian_pipeline_gateway.py

@@ -10,6 +10,7 @@ import pytest
 
 from k1link.simulation.gaussian_pipeline_gateway import (
     BUILD_REQUEST_SCHEMA,
+    GaussianArchiveUpload,
     GaussianPipelineGateway,
     GaussianPipelineGatewayError,
     GaussianPipelineIntegrityError,
@@ -163,6 +164,7 @@ def test_gateway_uploads_and_normalizes_archive_with_tus(tmp_path: Path) -> None
             received.extend(request.content)
             return httpx.Response(204, headers={"Upload-Offset": str(len(received))})
         if request.method == "POST" and request.url.path == "/v1/ingests":
+            assert request.extensions["timeout"]["read"] == 30 * 60.0
             submitted = json.loads(request.content)
             assert submitted["archive"] == {
                 "upload_id": "archive-001",
@@ -202,6 +204,36 @@ def test_gateway_uploads_and_normalizes_archive_with_tus(tmp_path: Path) -> None
     assert source.bundle_sha256 == bundle_sha
 
 
+def test_gateway_surfaces_bounded_provider_rejection_detail(tmp_path: Path) -> None:
+    def handler(_request: httpx.Request) -> httpx.Response:
+        return httpx.Response(
+            400,
+            json={
+                "error": "archive_link",
+                "message": "archive links are not supported",
+            },
+        )
+
+    with (
+        GaussianPipelineGateway(
+            "http://gaussian.test",
+            _token_file(tmp_path),
+            transport=httpx.MockTransport(handler),
+        ) as gateway,
+        pytest.raises(
+            GaussianPipelineGatewayError,
+            match=r"HTTP 400.*archive links are not supported",
+        ),
+    ):
+        gateway.normalize_archive(GaussianArchiveUpload(
+            upload_id="archive-001",
+            archive_name="source.rar",
+            format="rar",
+            sha256="a" * 64,
+            byte_length=128,
+        ))
+
+
 def test_gateway_rejects_incomplete_lcc_bundle(tmp_path: Path) -> None:
     bundle = tmp_path / "bundle"
     bundle.mkdir()

tests/test_simulation_projects.py

@@ -228,6 +228,37 @@ def test_service_resumes_a_persisted_provider_job_without_reupload(tmp_path: Pat
     assert provider.submit_calls == 0
 
 
+def test_failed_project_retries_from_retained_source_and_releases_old_job(tmp_path: Path) -> None:
+    store = SimulationProjectStore(tmp_path)
+    project = store.create(
+        name="Retry scene",
+        scene_type="outdoor",
+        source_kind="folder",
+        files=_folder_files(),
+    )
+    _upload_all(store, project)
+    store.begin_build(project["project_id"])
+    store.update_processing(
+        project["project_id"],
+        status="processing",
+        provider_job_id="gsp-20260826000000-deadbeef",
+        provider_state="failed",
+        progress={"completed_steps": 1, "total_steps": 4},
+        bundle_sha256="d" * 64,
+    )
+    store.fail(project["project_id"], "provider failure")
+    provider = _ReadyProvider()
+    service = SimulationProjectService(store, provider_factory=lambda: provider)  # type: ignore[arg-type]
+
+    queued = service.begin_build(project["project_id"])
+
+    assert provider.deleted == ["gsp-20260826000000-deadbeef"]
+    assert queued["status"] == "queued"
+    assert queued["error"] is None
+    assert queued["provider"]["job_id"] is None
+    assert queued["source"]["uploaded_byte_length"] == queued["source"]["total_byte_length"]
+
+
 def test_api_exposes_same_origin_resumable_upload_contract(tmp_path: Path) -> None:
     store = SimulationProjectStore(tmp_path)
     service = SimulationProjectService(store, provider_factory=lambda: None)