fix(clients/rust): use ucobs instead of cobs crate

Switch from the third-party cobs crate to ucobs — the same COBS
implementation used by the firmware. Keeps the entire stack on one
COBS library.

mux/rust/Cargo.lock

@@ -137,15 +137,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
 
-[[package]]
-name = "cobs"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fa961b519f0b462e3a3b4a34b64d119eeaca1d59af726fe450bbba07a9fc0a1"
-dependencies = [
- "thiserror",
-]
-
 [[package]]
 name = "colorchoice"
 version = "1.0.5"
@@ -173,9 +164,9 @@ name = "donglora-client"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "cobs",
  "serialport",
  "tracing",
+ "ucobs",
 ]
 
 [[package]]
@@ -759,6 +750,12 @@ dependencies = [
  "tracing-log",
 ]
 
+[[package]]
+name = "ucobs"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "311fbab511bafd13c109aff41f67d4c4426bf919a6670647e69f0d2af95ac01d"
+
 [[package]]
 name = "unescaper"
 version = "0.1.8"