Bump tokio from 1.44.2 to 1.46.1 in /backend

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.44.2 to 1.46.1.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-1.44.2...tokio-1.46.1)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.46.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

backend/Cargo.lock

@@ -1222,6 +1222,17 @@ dependencies = [
  "similar",
 ]
 
+[[package]]
+name = "io-uring"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b86e202f00093dcba4275d4636b93ef9dd75d025ae560d2521b45ea28ab49013"
+dependencies = [
+ "bitflags",
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.1"
@@ -2536,17 +2547,19 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.44.2"
+version = "1.46.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6b88822cbe49de4185e3a4cbf8321dd487cf5fe0c5c65695fef6346371e9c48"
+checksum = "0cc3a2344dafbe23a245241fe8b09735b521110d30fcefbbd5feb1797ca35d17"
 dependencies = [
  "backtrace",
  "bytes",
+ "io-uring",
  "libc",
  "mio",
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
+ "slab",
  "socket2",
  "tokio-macros",
  "windows-sys 0.52.0",

backend/sync_server/Cargo.toml

@@ -12,7 +12,7 @@ sync_lib = { path = "../sync_lib" }
 serde = { workspace = true }
 thiserror = { workspace = true }
 
-tokio = { version = "1.44.2", features = ["full"]}
+tokio = { version = "1.46.1", features = ["full"]}
 uuid = { version = "1.16.0", features = ["v4", "serde"] }
 log = { version = "0.4.27" }
 anyhow =  { version = "1.0.98", features = ["backtrace"] }