fix: resolve apiProxy via ctx.get for /model (v0.3.2)

Cordis throws on ctx.apiProxy without inject; use ctx.get and declare apiProxy inject so catalog and model APIs work under dsh web.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/index.d.ts

@@ -1,6 +1,7 @@
 import type { Context } from '@deepseek-ai/cordis';
 import Schema from '@deepseek-ai/schemastery';
 export declare const name = "dsh-telegram-channel";
+/** agents: followup; apiProxy: workspace/session catalog + /model (Cordis requires inject to read ctx.apiProxy). */
 export declare const inject: string[];
 export interface TelegramChannelConfig {
     token?: string;