fix(deepseek,infra): resolve compatible minimum OpenAI dependencies, bump min ver (#40738)

- The [DeepSeek release
check](https://github.com/langchain-ai/langchain/actions/runs/35686046493/job/106613011631)
downgraded core to 1.4.7 while retaining local OpenAI 1.6.3, which
requires core 1.6.4. Include `langchain-openai` in release
minimum-version selection so both dependencies are resolved together;
preserve local packages during PR checks.
- Raise DeepSeek's OpenAI minimum to 1.3.1: testing the old 1.1.0 floor
exposes missing model-profile behavior and package-version metadata. Add
regression coverage for release and PR dependency selection.

## Release note
`langchain-deepseek` now requires `langchain-openai>=1.3.1` for model
profiles and package-version metadata.

Made by [Open SWE](https://github.com/langchain-ai/open-swe) · [view
thread](https://openswe.vercel.app/agents/ed7f0398-e808-5f5b-9eb4-0521c82fff7f)
· openai:gpt-6-astra (low)

Co-authored-by: Mason <mdrxy@users.noreply.github.com>
Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>

.github/scripts/get_min_versions.py

@@ -19,6 +19,7 @@ from packaging.version import Version, parse
 
 MIN_VERSION_LIBS = [
     "langchain-core",
+    "langchain-openai",
     "langchain",
     "langchain-text-splitters",
     "numpy",
@@ -31,6 +32,7 @@ MIN_VERSION_LIBS = [
 # multiple libs
 SKIP_IF_PULL_REQUEST = [
     "langchain-core",
+    "langchain-openai",
     "langchain-text-splitters",
     "langchain",
 ]

.github/scripts/test_get_min_versions.py

@@ -0,0 +1,32 @@
+"""Regression tests for release minimum dependency selection."""
+
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+from get_min_versions import get_min_version_from_toml
+
+
+@pytest.mark.parametrize(
+    ("versions_for", "expected"),
+    [
+        ("release", {"langchain-core": "1.4.7", "langchain-openai": "1.1.0"}),
+        ("pull_request", {}),
+    ],
+)
+def test_openai_partner_minimum_versions(
+    tmp_path: Path, versions_for: str, expected: dict[str, str]
+) -> None:
+    manifest = tmp_path / "pyproject.toml"
+    manifest.write_text(
+        '[project]\ndependencies = ["langchain-core>=1.4.7,<2.0.0", '
+        '"langchain-openai>=1.1.0,<2.0.0"]\n'
+    )
+    versions = {
+        "langchain-core": ["1.6.4", "1.4.7", "1.1.0"],
+        "langchain-openai": ["1.6.3", "1.1.0", "1.0.0"],
+    }
+    with patch("get_min_versions.get_pypi_versions", side_effect=versions.__getitem__):
+        assert (
+            get_min_version_from_toml(str(manifest), versions_for, "3.11") == expected
+        )