Inference - Add lifecycle page (#2121)

## Description

Adds a page to the W&B Inference docs explaining our model lifecycle and
deprecation procedure.

<img width="3174" height="3068" alt="image"
src="https://github.com/user-attachments/assets/26d2655f-e3ae-4f55-983a-3ed9a9167361"
/>

## Testing
- [x] Local build succeeds without errors (`mint dev`)
- [x] Local link check succeeds without errors (`mint broken-links`)
- [x] PR tests succeed

---------

Co-authored-by: Matt Linville <matt.linville@wandb.com>
Co-authored-by: anastasiaguspan <happyguspan@gmail.com>

Author: 3 people

docs.json

@@ -1081,6 +1081,7 @@
               "inference",
               "inference/prerequisites",
               "inference/models",
+              "inference/lifecycle",
               "inference/lora",
               {
                 "group": "Response Settings",

inference/lifecycle.mdx

@@ -0,0 +1,36 @@
+---
+title: "Model Lifecycle"
+linkTitle: "Lifecycle"
+description: >
+  Learn about W&B Inference model lifecycle and retirement
+---
+
+New models are frequently evaluated and released as part of the W&B Inference catalog.
+
+Older models are regularly reviewed and may be retired to prioritize the most in-demand and highest-quality offerings.
+
+## Model Lifecycle Stages
+
+Models in W&B Inference use the following terminology for the stages of their lifecycle:
+
+* **Generally Available**: The model is fully supported and is recommended for use.
+* **Deprecated**: The model is scheduled for removal. Customers should update to a recommended replacement as soon as possible.
+* **Retired**: The model is no longer available. Any requests to retired models fail and return an `HTTP 404` status code for all requests.
+
+## Deprecation Process
+
+When deprecating a model, W&B will provide at least two weeks of notice on this page before the model is retired.
+
+We additionally attempt to notify recent users of a deprecated model via email
+and provide recommendations for replacement models.
+
+Models that are in the **deprecated** stage continue to serve requests.
+
+
+
+## Deprecated Models
+The following W&B Inference models are **deprecated**:
+
+| Deprecation date | Model ID                    | Recommended replacement         |
+|------------------|-----------------------------|---------------------------------|
+| 2026-02-05       | `Qwen/Qwen2.5-14B-Instruct` | `OpenPipe/Qwen3-14B-Instruct`   |