# Add Missing Rust Documentation

Run cargo clippy to identify items missing documentation, then add appropriate doc comments to all flagged items.

## Instructions

1. Run `cargo clippy --all-targets` to find missing documentation warnings
2. Parse the output to identify all items (functions, structs, enums, modules, etc.) that need documentation
3. For each missing doc comment:
   - Read the relevant file to understand the context
   - Add appropriate /// doc comments for public items
   - Add appropriate //! module-level doc comments where needed
   - Follow Rust documentation conventions:
     - First line is a brief summary (imperative mood: "Creates", "Returns", not "Create", "Return")
     - Add "# Errors" section for functions returning Result
     - Add "# Panics" section if function can panic
     - Add "# Examples" for complex public APIs
     - Use #[must_use] attribute where appropriate
4. After adding all documentation, run cargo clippy again to verify no missing docs warnings remain
5. Report summary of what was documented

## Documentation Style Guidelines

- Modules (//!): Describe the module's purpose and main types/functions
- Structs/Enums: Describe what the type represents
- Functions/Methods: Describe what it does, parameters, return value
- Fields: Document public fields with ///
- Keep it concise but informative
- Use markdown formatting for code examples

## Example Output Format

After completion, report:

Added documentation to:
- Module: src/domain/relay/entity.rs (module-level docs)
- Struct: Relay (3 public methods documented)
- Function: toggle() at src/domain/relay/entity.rs:XX

Total: X items documented
Clippy warnings resolved: X