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J. Nick Koston
95ee73e07f
Replace uint32_t entity_string_packed_ with 3 separate uint8_t fields (device_class_idx_, uom_idx_, icon_idx_) placed after the 1-byte EntityFlags struct. These fill the 3 padding bytes that the compiler would insert anyway for alignment, saving 4 bytes per entity with zero layout overhead. The set_entity_strings(uint32_t) API is preserved — it unpacks into the individual fields.
