chore(model-profiles): refresh model profile data (#36390)

Automated refresh of model profile data for all in-monorepo partner
integrations via `langchain-profiles refresh`.

🤖 Generated by the `refresh_model_profiles` workflow.

Co-authored-by: mdrxy <61371264+mdrxy@users.noreply.github.com>

libs/partners/openrouter/langchain_openrouter/data/_profiles.py

@@ -2903,6 +2903,27 @@ _PROFILES: dict[str, dict[str, Any]] = {
         "attachment": True,
         "temperature": True,
     },
+    "qwen/qwen3.6-plus-preview:free": {
+        "name": "Qwen3.6 Plus Preview (free)",
+        "release_date": "2026-03-30",
+        "last_updated": "2026-03-30",
+        "open_weights": False,
+        "max_input_tokens": 1000000,
+        "max_output_tokens": 65536,
+        "text_inputs": True,
+        "image_inputs": False,
+        "audio_inputs": False,
+        "video_inputs": False,
+        "text_outputs": True,
+        "image_outputs": False,
+        "audio_outputs": False,
+        "video_outputs": False,
+        "reasoning_output": True,
+        "tool_calling": True,
+        "structured_output": True,
+        "attachment": False,
+        "temperature": True,
+    },
     "sourceful/riverflow-v2-fast-preview": {
         "name": "Riverflow V2 Fast Preview",
         "release_date": "2025-12-08",