refactor(shared): centralize configuration and types

Migrate configuration validation and core moderation types from individual services to the `@bete/shared` package to ensure consistency across the monorepo.

- Move `AppConfig` and moderation-related interfaces to `packages/shared`.
- Replace service-specific Zod schemas with the centralized shared configuration.
- Refactor `services/backend` and `services/discord-gateway` to consume shared config and types.
- Remove redundant type definitions and local configuration logic in services.
- Update `packages/shared` exports to include new `config` and `moderation-types` modules.
- Clean up unused files and deprecated utility functions in `packages/shared`.

services/discord-gateway/src/modules/attachment-upload/attachmentUploader.ts

@@ -5,7 +5,7 @@ import {
   updateAttachmentAsUploaded,
   updateAttachmentDiscordUrl,
 } from "../message-capture/messageStore.js";
-import { uploadToTele } from "./teleUpload.js";
+import { uploadToTele } from "../voice-recording/teleUpload.js";
 
 const logger = createChildLogger("attachment-uploader");
 

services/discord-gateway/src/modules/attachment-upload/teleUpload.ts

@@ -1,75 +0,0 @@
-import { retryWithBackoff } from "@bete/shared/utils";
-
-export interface TeleUploadResponse {
-  download_url: string;
-  public_id?: string;
-  file_name?: string;
-  size_bytes?: number;
-}
-
-export interface TeleUploadResult {
-  url: string;
-  publicId?: string;
-  filename?: string;
-  sizeBytes?: number;
-}
-
-export function parseTeleUploadResponse(
-  response: TeleUploadResponse,
-): TeleUploadResult {
-  if (!response.download_url) {
-    throw new Error("Missing download_url in response");
-  }
-
-  return {
-    url: response.download_url,
-    publicId: response.public_id,
-    filename: response.file_name,
-    sizeBytes: response.size_bytes,
-  };
-}
-
-export async function uploadToTele(input: {
-  buffer: Buffer;
-  filename: string;
-  contentType: string;
-  uploadUrl: string;
-  timeoutMs?: number;
-  retries: number;
-}): Promise<TeleUploadResult> {
-  const { buffer, filename, contentType, uploadUrl, timeoutMs, retries } =
-    input;
-
-  const response = await retryWithBackoff(
-    async () => {
-      const fileBlob = new Blob([new Uint8Array(buffer)], {
-        type: contentType,
-      });
-      const formData = new FormData();
-      formData.append("file", fileBlob, filename);
-      formData.append("fileName", filename);
-
-      const res = await fetch(uploadUrl, {
-        method: "POST",
-        headers: {
-          accept: "application/json",
-        },
-        body: formData,
-        ...(timeoutMs ? { signal: AbortSignal.timeout(timeoutMs) } : {}),
-      });
-
-      if (!res.ok) {
-        throw new Error(`Upload failed: Status ${res.status}`);
-      }
-
-      return (await res.json()) as TeleUploadResponse;
-    },
-    {
-      retries,
-      minTimeout: 0,
-      maxTimeout: 0,
-    },
-  );
-
-  return parseTeleUploadResponse(response);
-}