[Connector] Env var validation (NaN on undefined), CPU parsing, symlink race, typo

[Flegma]

Summary

Minor configuration and code quality issues.

Findings

• configs/api.ts — parseInt(process.env.X as string) returns NaN if undefined.
• system.service.ts — CPU governor path parsing returns NaN if format changes.
• network.service.ts — NIC name interpolated into bash command (safe now but dangerous pattern).
• network.service.ts — typo: Error running processs (triple s).
• file-operations.service.ts — path validation does not follow symlinks.

Impact

NaN values cause silent failures. Potential future risks.

Suggested Fix

Add fallbacks to parseInt. Fix typo. Use Node.js APIs. Add fs.realpathSync after normalization.