Release this as v0.2.0, and give the Hub overview its own job, token and template

src/plugin-host/plugin.ts

@@ -11,7 +11,7 @@ import type { StorageCredentials } from "./storage.ts";
 // The Plainpages release this contract ships in — one version, not a second one to track. Its
 // major.minor must equal the release tag's; `release.yml` refuses to promote a tag that disagrees.
 // The patch digit may lag, since checkApiVersion ignores patch and auto-release cuts patches itself.
-export const HOST_API_VERSION = "0.1.0";
+export const HOST_API_VERSION = "0.2.0";
 
 export type HttpMethod = "DELETE" | "GET" | "HEAD" | "PATCH" | "POST" | "PUT";
 
@@ -160,7 +160,7 @@ export function checkApiVersion(pluginVersion: unknown, hostVersion: string = HO
     return { level: "refuse", message: `plugin targets apiVersion ${pluginVersion} but host is ${hostVersion}; upgrade the host` };
   }
   if (plugin.minor < host.minor) {
-    return { level: "warn", message: `plugin targets apiVersion ${pluginVersion}; host is ${hostVersion} — newer features available` };
+    return { level: "warn", message: `plugin targets apiVersion ${pluginVersion}; host is ${hostVersion} — built against an older release` };
   }
   return { level: "ok", message: `apiVersion ${pluginVersion}` };
 }