-- Track async insight generation jobs so the client can poll for
-- completion after the server returns 202 Accepted. The UNIQUE
-- constraint on (library_id, file_path, generation_type) ensures
-- idempotent inserts: if a running job already exists, the caller
-- should return that job_id instead of creating a duplicate.
CREATE TABLE insight_generation_jobs (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    library_id INTEGER NOT NULL DEFAULT 1,
    file_path TEXT NOT NULL,
    generation_type TEXT NOT NULL,
    status TEXT NOT NULL DEFAULT 'running',
    started_at INTEGER NOT NULL,
    completed_at INTEGER,
    result_insight_id INTEGER,
    error_message TEXT,
    UNIQUE(library_id, file_path, generation_type)
);

-- For the status endpoint: fast lookup by (library_id, file_path)
CREATE INDEX idx_insight_gen_jobs_file
    ON insight_generation_jobs(library_id, file_path);

-- For startup cleanup (future): prune old completed/failed jobs
CREATE INDEX idx_insight_gen_jobs_status_cleanup
    ON insight_generation_jobs(status, started_at);