chore: re-order backend file structure

apps/server/src/db/schema.ts

@@ -2,12 +2,19 @@ import { type } from "arktype";
 import { sql } from "drizzle-orm";
 import { int, sqliteTable, text } from "drizzle-orm/sqlite-core";
 
+const BACKEND_TYPES = {
+	nfs: "nfs",
+	smb: "smb",
+	directory: "directory",
+};
+export type BackendType = keyof typeof BACKEND_TYPES;
+
 const nfsConfigSchema = type({
 	backend: "'nfs'",
 	server: "string",
 	exportPath: "string",
 	port: "number",
-	version: type.enumerated(["3", "4"]),
+	version: "string", // Shold be an enum: "3" | "4" | "4.1"
 });
 
 const smbConfigSchema = type({
@@ -18,10 +25,12 @@ const directoryConfigSchema = type({
 	backend: "'directory'",
 });
 
-const configSchema = nfsConfigSchema
+export const volumeConfigSchema = nfsConfigSchema
 	.or(smbConfigSchema)
 	.or(directoryConfigSchema);
 
+export type BackendConfig = typeof volumeConfigSchema.infer;
+
 export const volumesTable = sqliteTable("volumes_table", {
 	id: int().primaryKey({ autoIncrement: true }),
 	name: text().notNull().unique(),
@@ -30,6 +39,6 @@ export const volumesTable = sqliteTable("volumes_table", {
 	createdAt: int("created_at").notNull().default(sql`(current_timestamp)`),
 	updatedAt: int("updated_at").notNull().default(sql`(current_timestamp)`),
 	config: text("config", { mode: "json" })
-		.$type<typeof configSchema.inferOut>()
+		.$type<typeof volumeConfigSchema.inferOut>()
 		.notNull(),
 });