chore: bump Rust toolchain to 1.98.0

[rochdev]

Summary

• bump the pinned Rust toolchain from 1.90.0 to 1.98.0
• satisfy rust-analyzer’s Rust 1.94+ requirement

Testing

• cargo check -p crashtracker -p process-discovery
• cargo check --target wasm32-unknown-unknown -p libdatadog-nodejs-capabilities -p pipeline -p sketches -p library-config
• git diff --check

Generated by Codex

[github-actions]

Overall package size

Self size: 29.3 MB
Deduped: 29.3 MB
No deduping: 29.3 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------|

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}