Two days chasing a SharedKey signature mismatch: fixing azurerm_storage_table_entity in Topaz

Some bugs announce themselves loudly. A null pointer in a hot path, a missing route that returns 404 to every request — the kind of thing that fails immediately and points straight at the cause. Others are quieter. They let most of the stack work correctly and only reveal themselves at the intersection of two independently correct but mutually incompatible assumptions. The azurerm_storage_table_entity failure was the second kind. This post is an account of a two-day investigation into a persiste