Cx Dev Log — 2026-05-01

Two sub-packets landed on submain today, moving the IR backend closer to supporting structs properly. The first package upgrades the instruction set to handle memory operations, and the second implements a struct registry integrated into the lowering pass. Together, these changes allow the lowering pass to recognize and manipulate the structs' memory representations, setting the stage for future struct-aware code generation. Meanwhile, main remains unchanged, while submain is breaking ground wit