Implement performance monitor

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hello-agent"
-version = "0.1.6"
+version = "0.1.7"
 edition = "2021"
 rust-version = "1.75"
 description = "Headless RustDesk-protocol-compatible support agent for Windows"
@@ -34,6 +34,12 @@ anyhow      = "1"
 # the inventory module's `use serde_json` doesn't depend on internal
 # implementation details of hbb_common.
 serde_json  = "1"
+# `perf_events.rs` derives Deserialize on the PowerShell row schema.
+# hbb_common re-exports `serde_derive` and `serde_json` but NOT `serde`
+# itself — and `#[derive(Deserialize)]` expands to a path that references
+# the `serde` crate root, so we depend on it explicitly with the `derive`
+# feature.
+serde       = { version = "1", features = ["derive"] }
 
 [target.'cfg(target_os = "windows")'.dependencies]
 windows-service = "0.6"