build(deps): bump crossbeam-channel from 0.5.14 to 0.5.15 in /src/agent

Bumps [crossbeam-channel](https://github.com/crossbeam-rs/crossbeam) from 0.5.14 to 0.5.15.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-channel-0.5.14...crossbeam-channel-0.5.15)

---
updated-dependencies:
- dependency-name: crossbeam-channel
  dependency-version: 0.5.15
  dependency-type: indirect
...

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

src/agent/Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -1258,9 +1258,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.14"
+version = "0.5.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06ba6d68e24814cb8de6bb986db8222d3a027d15872cabc0d18817bc3c0e4471"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
 dependencies = [
  "crossbeam-utils",
 ]
@@ -3104,15 +3104,12 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "json-patch",
- "logging",
  "regorus",
  "serde",
  "serde_json",
  "slog",
  "slog-scope",
- "slog-term",
  "tokio",
- "tokio-vsock 0.3.4",
 ]
 
 [[package]]
@@ -6922,9 +6919,7 @@ dependencies = [
  "bincode",
  "byteorder",
  "libc",
- "nix 0.24.3",
  "opentelemetry",
- "serde",
  "slog",
  "thiserror 1.0.69",
  "tokio",