augment-it augments — the first LLM call, and the loop that turns a column name into a column of answers

augment-it now does the thing it is named for. Two new microservices land — prompt-store holds prompt templates, prompt-runner makes the LLM calls — and together they close the augmentation loop: write a prompt with {{column}} placeholders, run it per-row against a record set, get back a derived record set with the model's answers as a new column. The proof-of-life was a web-search-backed prompt that turned a column of organisation names into a column of website URLs. This is the first time augment-it has called an LLM.