Changelog - aimdb-derive

All notable changes to the aimdb-derive crate will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

No changes yet.

Initial Release: #[derive(RecordKey)] macro for compile-time checked record keys
Attributes:
- #[key = "..."] (required): String representation for each variant
- #[key_prefix = "..."] (optional): Namespace prefix applied to all variants
- #[link_address = "..."] (optional): Connector metadata (MQTT topics, KNX addresses)
Generated Implementations:
- impl RecordKey with as_str() and link_address() methods
- impl Borrow<str> for O(1) HashMap lookups
- impl Hash that hashes the string key (satisfies Borrow<str> contract)
Compile-Time Validation:
- Duplicate key detection
- Unit variant enforcement (no tuple/struct variants)
- Missing #[key] attribute detection
no_std Support: Fully compatible with no_std environments