feat(server): lightweight s3 client (#14348)

#### PR Dependency Tree


* **PR #14348** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

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## Summary by CodeRabbit

* **New Features**
* Added a dedicated S3-compatible client package and expanded
S3-compatible storage config (endpoint, region, forcePathStyle,
requestTimeoutMs, minPartSize, presign options, sessionToken).
* Document sync now broadcasts batched/compressed doc updates for more
efficient real-time syncing.

* **Tests**
* New unit and benchmark tests for base64 utilities and S3 multipart
listing; updated storage-related tests to match new formats.

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tsconfig.json

@@ -132,6 +132,7 @@
     { "path": "./packages/common/infra" },
     { "path": "./packages/common/nbstore" },
     { "path": "./packages/common/reader" },
+    { "path": "./packages/common/s3-compat" },
     { "path": "./packages/frontend/admin" },
     { "path": "./packages/frontend/apps/android" },
     { "path": "./packages/frontend/apps/electron" },