Using `proc-macro` in `build.rs` causes high cpu usage

The rust-analyzer cannot handle big structs with proc-macros, in this case serde's derive macro, in build.rs properly. By adding more fields to a struct, it spins up CPU usage to 100% almost exponentially.

Steps:

1. Write the following mentioned code in build.rs
2. Rerun the editor
3. After finishing the first run compilation, try to edit the code
4. You will notice that the rust-analyzer uses 100% of a single core CPU usage for a long time and the LSP functionality will be blocked

NOTE 1: More fields, much longer wait time. For a struct with 200 fields, it goes into an almost infinite loop.
NOTE 2: It's just bound to build.rs and it works fine in lib.rs.

rust-analyzer version: rust-analyzer 1.87.0-nightly (9fb94b3 2025-03-10)

rustc version: rustc 1.87.0-nightly (9fb94b32d 2025-03-10)

editor or extension: neovim

relevant settings: enabled procMacro and buildScript features.

rust-analyzer command: cargo clippy --message-format=json --all-targets --all-features

repository link (if public, optional): N/A

code snippet to reproduce:

// Cargo.toml
[package]
name = "test_script"
version = "0.1.0"
edition = "2024"

[build-dependencies]
serde = { version = "1.0.219", features = ["derive"] }

// build.rs
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Translations {
    pub af: Option<String>,
    pub am: Option<String>,
    pub ar: Option<String>,
    pub az: Option<String>,
    pub be: Option<String>,
    pub bg: Option<String>,
    pub bn: Option<String>,
    pub ca: Option<String>,
    pub cs: Option<String>,
    pub da: Option<String>,
    pub de: Option<String>,
    pub el: Option<String>,
    pub en: Option<String>,
    pub es: Option<String>,
    pub et: Option<String>,
    pub eu: Option<String>,
    pub fa: Option<String>,
    pub fi: Option<String>,
    pub fr: Option<String>,
    pub gl: Option<String>,
    pub gu: Option<String>,
    pub he: Option<String>,
    pub hi: Option<String>,
    pub hr: Option<String>,
    pub hu: Option<String>,
    pub hy: Option<String>,
    pub id: Option<String>,
    pub is: Option<String>,
    pub it: Option<String>,
    pub ja: Option<String>,
    pub ka: Option<String>,
    pub kn: Option<String>,
    pub ko: Option<String>,
    pub lt: Option<String>,
    pub lv: Option<String>,
    pub ml: Option<String>,
    pub mn: Option<String>,
    pub mr: Option<String>,
    pub ms: Option<String>,
    pub nb: Option<String>,
    pub nl: Option<String>,
    pub pl: Option<String>,
    pub ps: Option<String>,
    pub pt: Option<String>,
    pub ro: Option<String>,
    pub ru: Option<String>,
    pub si: Option<String>,
    pub sk: Option<String>,
    pub sl: Option<String>,
    pub sr: Option<String>,
    pub sv: Option<String>,
    pub sw: Option<String>,
    pub ta: Option<String>,
    pub te: Option<String>,
    pub th: Option<String>,
    pub tk: Option<String>,
    pub tr: Option<String>,
    pub uk: Option<String>,
    pub ur: Option<String>,
    pub vi: Option<String>,
    pub zh: Option<String>,
    pub cy: Option<String>,
    pub ceb: Option<String>,
    pub sr_latn: Option<String>,
    pub yue_hans: Option<String>,
    pub jv: Option<String>,
    pub sq: Option<String>,
    pub ccp: Option<String>,
    pub ga: Option<String>,
    pub ky: Option<String>,
    pub pa: Option<String>,
    pub kk: Option<String>,
    pub yue: Option<String>,
    pub yo: Option<String>,
    pub uz: Option<String>,
    pub bs: Option<String>,
    pub mk: Option<String>,
    pub ne: Option<String>,
    pub no: Option<String>,
    pub yo_bj: Option<String>,
    pub my: Option<String>,
    pub sd: Option<String>,
    pub ha: Option<String>,
    pub ha_ne: Option<String>,
    pub or: Option<String>,
    pub tm: Option<String>,
    pub so: Option<String>,
    pub km: Option<String>,
    pub zu: Option<String>,
    pub as_: Option<String>,
    pub lo: Option<String>,
    pub ig: Option<String>,
    pub tl: Option<String>,
    pub de_ch: Option<String>,
    pub la: Option<String>,
    pub fil: Option<String>,
    pub zh_hant: Option<String>,
    pub sc: Option<String>,
    pub dv: Option<String>,
    pub os: Option<String>,
    pub oc: Option<String>,
    pub br: Option<String>,
    pub lb: Option<String>,
    pub ast: Option<String>,
}

fn main() {}

Reproduce the report with the supplied Cargo.toml and build.rs, then compare the same struct in lib.rs while procMacro and buildScript are enabled. Trace the rust-analyzer build-script and proc-macro path; done when the large struct no longer causes prolonged single-core saturation and LSP functionality remains responsive.