import-functions-parse-before-dispatch

IN premise — entries/2026/05/11/tests-test_pg_dispatch.md

API import functions (`import_json`, `import_beliefs`, `import_agent`) read and parse files into structured data in the API layer before delegating to `PgApi` — PgApi never receives raw file paths

Summary

The API layer handles all file reading and parsing itself, so PgApi only ever receives already-structured data like parsed JSON objects or belief arrays. This means PgApi has no file system dependencies and can be tested or replaced without needing access to the original files.