refactor: migrate discord-gateway from winston to @bete/shared/logger and utils

- Replace all local logger imports (../../shared/logger/logger.js) with @bete/shared/logger across 26 files
- Remove winston dependency, add pino to discord-gateway package.json
- Delete shared/logger/logger.ts (winston-based, 132 lines) and serialization.ts (109 lines)
- Replace local retryWithBackoff imports with @bete/shared/utils across 6 files
- Delete shared/utils/retry.ts (42 lines)
- Add CustomLogger type alias to @bete/shared/logger for backwards compatibility
- Remove logger param from all retryWithBackoff calls and uploadToTele interfaces
- Frontend: convert entity type files to re-exports from shared/api/client.ts
- Full monorepo typecheck clean (4/4 packages)

35 files changed, 42 insertions(+), 488 deletions(-)

services/discord-gateway/src/shared/utils/retry.ts

@@ -1,42 +0,0 @@
-import pRetry from "p-retry";
-import type { CustomLogger } from "../../shared/logger/logger.js";
-
-export interface RetryOptions {
-  retries?: number;
-  minTimeout?: number;
-  maxTimeout?: number;
-  factor?: number;
-  logger?: CustomLogger;
-}
-
-export async function retryWithBackoff<T>(
-  fn: () => Promise<T>,
-  options: RetryOptions = {},
-): Promise<T> {
-  const {
-    retries = 3,
-    minTimeout = 0,
-    maxTimeout = 0,
-    factor = 1,
-    logger,
-  } = options;
-
-  return pRetry(fn, {
-    retries,
-    minTimeout,
-    maxTimeout,
-    factor,
-    onFailedAttempt: (error) => {
-      if (logger) {
-        logger.warn(
-          {
-            attempt: error.attemptNumber,
-            retriesLeft: error.retriesLeft,
-            error: error.error,
-          },
-          "Retry attempt",
-        );
-      }
-    },
-  });
-}