docs: add sunset notice to README

Cargo.toml

@@ -18,3 +18,6 @@ serde_repr = "0.1"
 url = "2.5"
 uuid = { version = "1.11", features = ["serde", "v4"] }
 reqwest = { version = "0.12", features = ["json", "multipart"] }
+
+[badges]
+maintenance = { status = "deprecated" }

README.md

@@ -3,6 +3,9 @@
 ![crates.io](https://img.shields.io/crates/v/passage_flex.svg) [![Rust](https://img.shields.io/badge/Rust-%23000000.svg?e&logo=rust&logoColor=white)](#) ![GitHub License](https://img.shields.io/github/license/passageidentity/passage-flex-rust)
 ![Static Badge](https://img.shields.io/badge/Built_by_1Password-grey?logo=1password)
 
+# ⚠️ DEPRECATED
+**This repository is deprecated and no longer maintained as of January 16, 2026.**
+
 ## About
 
 [Passage by 1Password](https://1password.com/product/passage) unlocks the passwordless future with a simpler, more secure passkey authentication experience. Passage handles the complexities of the [WebAuthn API](https://blog.1password.com/what-is-webauthn/), and allows you to implement passkeys with ease.

release-please-config.json

@@ -7,7 +7,10 @@
       "bump-patch-for-minor-pre-major": false,
       "draft": false,
       "prerelease": false,
-      "include-component-in-tag": false
+      "include-component-in-tag": false,
+      "changelog-sections": [
+        { "type": "docs", "section": "Documentation", "hidden": false }
+      ]
     }
   },
   "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"