PrismNote v0.4.3

v0.4.3 — real SQL execution (DB + warehouses via OSS connectors), Data & SQL panel with results view + Insert-into-notebook, variable explorer, menu parity (cell ops, find & replace, run-range, Kernel menu), Explorer file ops (new/rename/delete/upload, drag-drop, multi-select, git decorations, show-hidden), reliable New Notebook (no prompt) + inline rename, and an Ocean-Blue theme (no violet). macOS (Apple Silicon) binary attached; self-contained.