harden database interactions and improve error handling

server/db/index.ts

@@ -8,5 +8,6 @@ const dbPath = process.env.DATABASE_PATH || resolve(process.cwd(), "revisione.db
 const sqlite = new Database(dbPath);
 sqlite.pragma("journal_mode = WAL");
 sqlite.pragma("foreign_keys = ON");
+sqlite.pragma("wal_autocheckpoint = 1000");
 
 export const db = drizzle(sqlite, { schema });

server/db/schema.ts

@@ -15,6 +15,8 @@ export const courses = sqliteTable("courses", {
   costAudio: real("cost_audio").default(0),
   auditReport: text("audit_report"),
   auditScore: integer("audit_score"),
+  auditStatus: text("audit_status", { enum: ["pending", "running", "complete", "error"] }).default("pending"),
+  inferenceWarning: integer("inference_warning", { mode: "boolean" }).default(false),
   organisation: text("organisation"),
   createdAt: text("created_at")
     .notNull()