docs: update Cloudflare examples for env references (#31205)

- [ ] **Docs Update**: "langchain-cloudflare: add env var references in
example notebooks"
- We've updated our Cloudflare integration example notebooks with
examples showing environmental variables to initialize the class
instances.

docs/docs/integrations/chat/cloudflare_workersai.ipynb

@@ -41,7 +41,7 @@
     "### Credentials\n",
     "\n",
     "\n",
-    "Head to https://www.cloudflare.com/developer-platform/products/workers-ai/ to sign up to CloudflareWorkersAI and generate an API key. Once you've done this set the CF_API_KEY environment variable and the CF_ACCOUNT_ID environment variable:"
+    "Head to https://www.cloudflare.com/developer-platform/products/workers-ai/ to sign up to CloudflareWorkersAI and generate an API key. Once you've done this set the CF_AI_API_KEY environment variable and the CF_ACCOUNT_ID environment variable:"
    ]
   },
   {
@@ -56,8 +56,8 @@
     "import getpass\n",
     "import os\n",
     "\n",
-    "if not os.getenv(\"CF_API_KEY\"):\n",
-    "    os.environ[\"CF_API_KEY\"] = getpass.getpass(\n",
+    "if not os.getenv(\"CF_AI_API_KEY\"):\n",
+    "    os.environ[\"CF_AI_API_KEY\"] = getpass.getpass(\n",
     "        \"Enter your CloudflareWorkersAI API key: \"\n",
     "    )\n",
     "\n",

docs/docs/integrations/text_embedding/cloudflare_workersai.ipynb

@@ -12,24 +12,36 @@
     "\n",
     ">[Cloudflare Workers AI](https://developers.cloudflare.com/workers-ai/) allows you to run machine learning models, on the `Cloudflare` network, from your code via REST API.\n",
     "\n",
-    ">[Cloudflare AI document](https://developers.cloudflare.com/workers-ai/models/text-embeddings/) listed all text embeddings models available.\n",
+    ">[Workers AI Developer Docs](https://developers.cloudflare.com/workers-ai/models/text-embeddings/) lists all text embeddings models available.\n",
     "\n",
     "## Setting up\n",
     "\n",
-    "Both Cloudflare account ID and API token are required. Find how to obtain them from [this document](https://developers.cloudflare.com/workers-ai/get-started/rest-api/).\n"
+    "Both a Cloudflare Account ID and Workers AI API token are required. Find how to obtain them from [this document](https://developers.cloudflare.com/workers-ai/get-started/rest-api/).\n",
+    "\n",
+    "You can pass these parameters explicitly or define as environmental variables.\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 11,
    "id": "f60023b8",
-   "metadata": {},
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2025-05-13T06:00:30.121204Z",
+     "start_time": "2025-05-13T06:00:30.117936Z"
+    }
+   },
    "outputs": [],
    "source": [
-    "import getpass\n",
+    "import os\n",
     "\n",
-    "my_account_id = getpass.getpass(\"Enter your Cloudflare account ID:\\n\\n\")\n",
-    "my_api_token = getpass.getpass(\"Enter your Cloudflare API token:\\n\\n\")"
+    "from dotenv import load_dotenv\n",
+    "\n",
+    "load_dotenv(\".env\")\n",
+    "\n",
+    "cf_acct_id = os.getenv(\"CF_ACCOUNT_ID\")\n",
+    "\n",
+    "cf_ai_token = os.getenv(\"CF_AI_API_TOKEN\")"
    ]
   },
   {
@@ -42,9 +54,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 12,
    "id": "92c5b61e",
-   "metadata": {},
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2025-05-13T06:00:31.224996Z",
+     "start_time": "2025-05-13T06:00:31.222981Z"
+    }
+   },
    "outputs": [],
    "source": [
     "from langchain_cloudflare.embeddings import (\n",
@@ -54,25 +71,28 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 13,
    "id": "062547b9",
-   "metadata": {},
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2025-05-13T06:00:32.515031Z",
+     "start_time": "2025-05-13T06:00:31.798590Z"
+    }
+   },
    "outputs": [
     {
      "data": {
-      "text/plain": [
-       "(384, [-0.033627357333898544, 0.03982774540781975, 0.03559349477291107])"
-      ]
+      "text/plain": "(384, [-0.033660888671875, 0.039764404296875, 0.03558349609375])"
      },
-     "execution_count": 3,
+     "execution_count": 13,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
     "embeddings = CloudflareWorkersAIEmbeddings(\n",
-    "    account_id=my_account_id,\n",
-    "    api_token=my_api_token,\n",
+    "    account_id=cf_acct_id,\n",
+    "    api_token=cf_ai_token,\n",
     "    model_name=\"@cf/baai/bge-small-en-v1.5\",\n",
     ")\n",
     "# single string embeddings\n",
@@ -82,17 +102,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 14,
    "id": "e1dcc4bd",
-   "metadata": {},
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2025-05-13T06:00:33.106160Z",
+     "start_time": "2025-05-13T06:00:32.847232Z"
+    }
+   },
    "outputs": [
     {
      "data": {
-      "text/plain": [
-       "(3, 384)"
-      ]
+      "text/plain": "(3, 384)"
      },
-     "execution_count": 4,
+     "execution_count": 14,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -102,14 +125,6 @@
     "batch_query_result = embeddings.embed_documents([\"test1\", \"test2\", \"test3\"])\n",
     "len(batch_query_result), len(batch_query_result[0])"
    ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "52de8b88",
-   "metadata": {},
-   "outputs": [],
-   "source": []
   }
  ],
  "metadata": {