Add tests, schema sync safeguards, and query/handler improvements

- Add bun test suite: SQL generator and value unit tests, plus MariaDB
  integration tests gated on BUN_MARIADB_TEST_DB
- schema: add --dry-run and require confirmation (or --yes) before
  dropping tables/columns; block unapproved destructive statements
- Always AND targetId with the query, regardless of searchOperator
- Initialize lazily on first call; init throws instead of exiting
- Generate IN (?, ?, ...) lists for IN / NOT IN
- Share value binding between insert and update (booleans, embeddings,
  function values, "" -> NULL for non-text columns)
- Keep Buffers and convert BigInt/Date without a JSON round-trip
- DbSQL: report success for empty SELECT results
- Run update() in a transaction with row locking
- Key the client cache on the full connection config
- Consolidate identifier quoting, drop dead code, merge column lookup
- Read CLI version from package.json, pin @types/bun, chmod CLI on compile
- Rebuild dist

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

dist/utils/trim-backups.js

@@ -3,9 +3,13 @@ import fs from "fs";
 import grabSortedBackups from "./grab-sorted-backups";
 import { AppData } from "../data/app-data";
 import path from "path";
+import _ from "lodash";
 export default function trimBackups({ config }) {
     const { backup_dir } = grabDBDir({ config });
-    const backups = grabSortedBackups({ config });
+    // Only consider files written by `backup` (`{db_name}-{timestamp}.sql`)
+    const backupNamePattern = new RegExp(`^${_.escapeRegExp(config.db_name)}-\\d+\\.sql$`);
+    const backups = grabSortedBackups({ config }).filter((name) => backupNamePattern.test(name) &&
+        fs.statSync(path.join(backup_dir, name)).isFile());
     const max_backups = config.max_backups || AppData["MaxBackups"];
     for (let i = 0; i < backups.length; i++) {
         const backup_name = backups[i];