fix(discord): restrict activity types and statuses to valid enum values

- Removed 'offline' from valid config statuses (use 'invisible').
- Restricted activityType to 0, 1, 2, 3, 5 (excluding custom/4).
- Added logic to only send 'url' when activityType is 1 (Streaming).
- Updated Typescript definitions and Zod schemas to match.

src/config/zod-schema.providers-core.ts

@@ -333,8 +333,10 @@ export const DiscordAccountSchema = z
       .optional(),
     responsePrefix: z.string().optional(),
     activity: z.string().optional(),
-    status: z.enum(["online", "dnd", "idle", "invisible", "offline"]).optional(),
-    activityType: z.number().int().min(0).max(5).optional(),
+    status: z.enum(["online", "dnd", "idle", "invisible"]).optional(),
+    activityType: z
+      .union([z.literal(0), z.literal(1), z.literal(2), z.literal(3), z.literal(5)])
+      .optional(),
     activityUrl: z.string().optional(),
   })
   .strict();