Add explanatory comments

When code behavior, limitations, or implementation decisions are not immediately obvious from reading the code itself, add explanatory comments to clarify the reasoning and context. This is especially important for:

• API limitations and scope: Document when functions or classes have restricted functionality or are not part of standard APIs
• Implementation decisions: Explain why certain approaches were chosen, especially when they might seem unusual
• Disabled linting rules: Always explain why specific linting rules are disabled
• Placeholder or unused code: Clarify the purpose of code that exists for compatibility but isn’t functionally used

Example from the codebase:

// @ts-expect-error TS2416 Types insist value is a Socket, but it's actually unknown
set connection(value: unknown) {
  // Note: #socket is not actually used for anything other than making 
  // the property available for compatibility
  this.#socket = value;
}

/* eslint-disable @typescript-eslint/no-deprecated */
// Disabling deprecated warnings for this.finished and other attributes 
// which are deprecated in types/node package but required for compatibility

This practice prevents confusion for future maintainers and helps reviewers understand the context behind implementation choices.