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/functions/init.d.ts

@@ -9,4 +9,12 @@ declare global {
     var CONFIG_FILE_PATH: string;
     var SCHEMA_FILE_PATH: string;
 }
+/**
+ * Load config + schema and set up the shared MariaDB client.
+ * Throws on any problem (never exits the process).
+ */
 export default function init(): void;
+/**
+ * Initialize once, on first use.
+ */
+export declare function ensureInit(): void;