Architecture decision records

Each record captures one decision that shapes evalkit, the context it was made in, and what it costs. A record's status changes when a later decision replaces it.

Record	Status
0001. Suites are strict YAML files validated by pydantic	Accepted
0002. Cache model responses in SQLite	Accepted
0003. Release from a version tag, not release-please	Accepted
0004. Ship standalone executables built with PyInstaller	Accepted

To propose a new decision, copy the structure of an existing record into the next number and open a pull request.