Port bun-mariadb conventions: init globals, db handler, split schema sync

- init() loads config, schema and the SQLite client once into globals
- all CRUD queries go through lib/db-handler.ts (optional per-call config)
- split db-schema-manager.ts into lib/schema/* with FK-aware table ordering
- add bun:test tests for schema ordering, FK constraints and schema sync
- config/schema files can be .ts/.js/.json/.yaml/.yml; db_schema_file_name
  is now optional (defaults to schema.* in db_dir)
- add export/import commands (database snapshot + schema archives)
- package exports map, type re-exports, hardened publish.sh
- validate table name in delete

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/commands/admin/index.ts

@@ -1,22 +1,14 @@
 import { Command } from "commander";
-import init from "../../functions/init";
-import grabDBDir from "../../utils/grab-db-dir";
 import chalk from "chalk";
 import { select } from "@inquirer/prompts";
-import { Database } from "bun:sqlite";
 import listTables from "./list-tables";
 import runSQL from "./run-sql";
-import * as sqliteVec from "sqlite-vec";
 
 export default function () {
     return new Command("admin")
         .description("View Tables and Data, Run SQL Queries, Etc.")
         .action(async () => {
-            const { config } = await init();
-            const { db_file_path } = grabDBDir({ config });
-            const db = new Database(db_file_path);
-
-            sqliteVec.load(db);
+            const db = global.SQLITE_CLIENT;
 
             console.log(chalk.bold(chalk.blue("\nBun SQLite Admin\n")));