Update request tags doc to show model-level config

- Set tags directly on model deployments in litellm_params
- Requests just specify model, tags applied automatically
- Use clear naming: AWS_IAM_PROD, AWS_IAM_DEV

Co-authored-by: ishaan <ishaan@berri.ai>

docs/my-website/docs/proxy/request_tags.md

@@ -1,70 +1,52 @@
-import Tabs from '@theme/Tabs';
-import TabItem from '@theme/TabItem';
-
 # Request Tags for Spend Tracking
 
-Add tags to your LLM requests to track spend by environment, AWS account, team, or any custom label.
+Add tags to model deployments to track spend by environment, AWS account, or any custom label.
 
 Tags appear in the `request_tags` field of LiteLLM spend logs.
 
-## Set Default Tags in Config
+## Config Setup
 
-Set default tags for all API keys generated through the proxy:
+Set tags on model deployments in `config.yaml`:
 
 ```yaml title="config.yaml"
-litellm_settings:
-  default_key_generate_params:
-    metadata:
-      tags: ["AWS_IAM_PROD", "us-east-1"]
+model_list:
+  - model_name: gpt-4
+    litellm_params:
+      model: azure/gpt-4-prod
+      api_key: os.environ/AZURE_PROD_API_KEY
+      api_base: https://prod.openai.azure.com/
+      tags: ["AWS_IAM_PROD"]  # 👈 Tag for production
+
+  - model_name: gpt-4-dev
+    litellm_params:
+      model: azure/gpt-4-dev
+      api_key: os.environ/AZURE_DEV_API_KEY
+      api_base: https://dev.openai.azure.com/
+      tags: ["AWS_IAM_DEV"]  # 👈 Tag for development
 ```
 
-All keys created via `/key/generate` will automatically include these tags.
+## Make Request
 
-## Send Tags in Request
-
-Pass tags in the request body:
-
-<Tabs>
-<TabItem value="curl" label="cURL">
+Requests just specify the model - tags are automatically applied:
 
 ```bash
 curl -X POST 'http://0.0.0.0:4000/chat/completions' \
   -H 'Authorization: Bearer sk-1234' \
   -H 'Content-Type: application/json' \
-  -d '{
-    "model": "gpt-4",
-    "messages": [{"role": "user", "content": "Hello"}],
-    "metadata": {
-      "tags": ["AWS_IAM_PROD", "us-east-1"]
-    }
-  }'
-```
-
-</TabItem>
-<TabItem value="header" label="Header">
-
-```bash
-curl -X POST 'http://0.0.0.0:4000/chat/completions' \
-  -H 'Authorization: Bearer sk-1234' \
-  -H 'Content-Type: application/json' \
-  -H 'x-litellm-tags: AWS_IAM_PROD,us-east-1' \
   -d '{
     "model": "gpt-4",
     "messages": [{"role": "user", "content": "Hello"}]
   }'
 ```
 
-</TabItem>
-</Tabs>
+## Spend Logs
 
-## Where Tags Appear
-
-Tags are stored in `LiteLLM_SpendLogs` under `request_tags`:
+The tag from the model config appears in `LiteLLM_SpendLogs`:
 
 ```json
 {
   "request_id": "chatcmpl-abc123",
-  "request_tags": ["AWS_IAM_PROD", "us-east-1"],
+  "request_tags": ["AWS_IAM_PROD"],
   "spend": 0.002,
   "model": "gpt-4"
 }