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/lib/schema/run-schema-query.js

@@ -1,5 +1,53 @@
 import dbHandler from "../db-handler";
+let schemaRunState = null;
+/**
+ * Statements that discard stored data (tables or column values).
+ */
+export function isDestructiveSchemaStatement(query) {
+    return /^\s*DROP\s+TABLE\b/i.test(query) || /\bDROP\s+COLUMN\b/i.test(query);
+}
+/**
+ * Run `fn` with schema statements recorded but not executed.
+ * Reads (information_schema) still run, so the plan is a close approximation:
+ * steps that depend on earlier changes (e.g. after a table rename) may differ.
+ */
+export async function planSchemaQueries(fn) {
+    const previous = schemaRunState;
+    schemaRunState = { dryRun: true, statements: [], allowDestructive: true };
+    try {
+        await fn();
+        return schemaRunState.statements;
+    }
+    finally {
+        schemaRunState = previous;
+    }
+}
+/**
+ * Run `fn`, refusing any destructive statement that was not approved.
+ */
+export async function runSchemaQueriesGuarded(fn, allowDestructive) {
+    const previous = schemaRunState;
+    schemaRunState = { dryRun: false, statements: [], allowDestructive };
+    try {
+        await fn();
+    }
+    finally {
+        schemaRunState = previous;
+    }
+}
 export default async function runSchemaQuery({ query, values, config, }) {
+    if (schemaRunState) {
+        schemaRunState.statements.push(query);
+        if (schemaRunState.dryRun) {
+            return;
+        }
+        const allowed = schemaRunState.allowDestructive;
+        if (allowed !== true &&
+            isDestructiveSchemaStatement(query) &&
+            !allowed.has(query)) {
+            throw new Error(`Refusing unapproved destructive statement: ${query}. Re-run with --dry-run to review, or --yes to allow it.`);
+        }
+    }
     const res = await dbHandler({
         query,
         values,