feat(server): impl storage runtime (#15181)

#### PR Dependency Tree


* **PR #15181** 👈

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

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added an additional storage backend option: asset-pack based storage
(provider for avatar, blob, and copilot).
* Introduced a dedicated storage runtime with provider capability
reporting and expanded object operations (put/head/get/list/delete),
including presigned and multipart flows where supported.
* Cloudflare R2 `jurisdiction` now uses an explicit default when
omitted.
* **Bug Fixes**
  * Broadened avatar access to allow both fs and asset-pack providers.
* Improved workspace blob upload completion validation and handling when
stored objects are missing or mismatched.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/native/Cargo.toml

@@ -16,17 +16,20 @@ affine_common = { workspace = true, features = [
   "ydoc-loader",
 ] }
 anyhow = { workspace = true }
-aws-sdk-s3 = "1.137.0"
+assetpack-core = "0.1.0"
+assetpack-transform-precomp2 = "0.1.0"
 base64 = { workspace = true }
 chrono = { workspace = true }
+crc32fast = "1.5.0"
 doc_extractor = { workspace = true }
 file-format = { workspace = true }
 hex = { workspace = true }
 homedir = { workspace = true }
 image = { workspace = true }
 infer = { workspace = true }
+instant-xml = "0.7.5"
 jsonschema = "0.46"
-libwebp-sys = { workspace = true }
+libwebp-sys = "0.9.6"
 little_exif = { workspace = true }
 llm_adapter = { workspace = true, features = ["schema", "ureq-client"] }
 llm_runtime = { workspace = true, features = ["schema", "ureq-client"] }
@@ -36,6 +39,10 @@ napi = { workspace = true, features = ["async", "serde-json"] }
 napi-derive = { workspace = true }
 p256 = { workspace = true }
 rand = { workspace = true }
+reqwest = { version = "0.13.4", default-features = false, features = [
+  "rustls",
+] }
+rusty-s3 = "0.10.0"
 safefetch = { workspace = true }
 schemars = { workspace = true }
 serde = { workspace = true, features = ["derive"] }
@@ -50,6 +57,7 @@ sqlx = { workspace = true, default-features = false, features = [
   "postgres",
   "runtime-tokio",
 ] }
+thiserror.workspace = true
 tiktoken-rs = { workspace = true }
 tokio = { workspace = true, features = ["rt-multi-thread", "sync"] }
 url = { workspace = true }
@@ -64,8 +72,9 @@ mimalloc = { workspace = true }
 mimalloc = { workspace = true, features = ["local_dynamic_tls"] }
 
 [dev-dependencies]
-rayon = { workspace = true }
-tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
+rayon    = { workspace = true }
+tempfile = "3.27.0"
+tokio    = { workspace = true, features = ["macros", "rt-multi-thread"] }
 
 [build-dependencies]
 napi-build = { workspace = true }