fix(GRO-1368): remove unused getDb import from consent.ts

getDb was imported but never used — db is passed as a parameter to
handleConsentKeyword. This was the primary TypeScript/lint error
flagged by QA.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/services/messaging/consent.ts

@@ -1,4 +1,4 @@
-import { getDb, clients, messageConsentEvents, eq } from "@groombook/db";
+import { clients, messageConsentEvents, eq } from "@groombook/db";
 import type { Db } from "@groombook/db";
 
 export type KeywordKind = "opt_in" | "opt_out" | "help";