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/sql-value-placeholder.d.ts

@@ -0,0 +1,19 @@
+import type { BUN_MARIADB_FieldSchemaType, SQLInsertGenValueType } from "../types";
+type Return = {
+    placeholder: string;
+    value: SQLInsertGenValueType;
+};
+/**
+ * Map a JS value to a bound parameter + placeholder for INSERT / UPDATE.
+ *
+ * - `false` / `true` -> `0` / `1`
+ * - number arrays (embeddings) -> `VEC_FromText(?)` with a JSON string
+ * - `{ value, placeholder }` factories are called once
+ * - `""` stays `""` for text columns and becomes `NULL` for everything else
+ *   (e.g. the `number | ""` typedefs for numeric columns)
+ */
+export default function sqlValuePlaceholder({ value, field, }: {
+    value: any;
+    field?: BUN_MARIADB_FieldSchemaType;
+}): Return;
+export {};