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

#### PR Dependency Tree


* **PR #14348** 👈

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

<!-- This is an auto-generated comment: release notes by coderabbit.ai
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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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packages/frontend/mobile-native/Cargo.toml

@@ -12,6 +12,7 @@ name = "uniffi-bindgen"
 path = "uniffi-bindgen.rs"
 
 [features]
+default    = ["use-as-lib"]
 use-as-lib = ["affine_nbstore/use-as-lib"]
 
 [dependencies]