Adds three LLM-fillable slots to every CalDav feed item:
insight, preparation, and crossSource. Slot prompts are
stored in separate .txt files under src/prompts/ with
few-shot examples to steer the LLM away from restating
event details.
Co-authored-by: Ona <no-reply@ona.com>
Rename all references across the codebase: package names,
imports, source IDs, directory names, docs, and configs.
Co-authored-by: Ona <no-reply@ona.com>
