chore: dedup dead code + compress utility

- Hapus src/shared/utils/retry.ts (0 imports, dead)
- Hapus src/shared/errors/index.ts (7 classes, 0 imports)
- Hapus drizzle type exports dari schema.ts (tidak dipake)
- Hapus src/config/index.ts, redirect 8 imports langsung ke env.ts
- Ekstrak maybeCompressChunk ke shared/utils/compress.ts
- Hapus duplikasi gzipSync di upload-file.ts + chunked-storage.ts
- Lint clean, build clean

src/interfaces/http/controllers/web-api-controller.ts

@@ -1,6 +1,6 @@
 import { createReadStream } from 'node:fs';
 import { nanoid } from 'nanoid';
-import { config } from '../../../config/index';
+import { config } from '../../../env';
 import { bucketRepository, chunkedStorage, fileRepository } from '../../../infrastructure/di';
 import { db, files as fileSchema } from '../../../infrastructure/persistence/drizzle/index';
 import { botPool } from '../../../infrastructure/telegram/bot-pool';