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/lib/schema/sync-indexes.ts

@@ -0,0 +1,53 @@
+import type { Database } from "bun:sqlite";
+import type { BUN_SQLITE_TableSchemaType } from "../../types";
+import { sqlQuoteIdent as q } from "../../utils/sql-safe";
+
+type Params = {
+    db: Database;
+    table: BUN_SQLITE_TableSchemaType;
+};
+
+/**
+ * Sync indexes for a table
+ */
+export default function syncIndexes({ db, table }: Params) {
+    if (!table.indexes || table.indexes.length === 0) {
+        return;
+    }
+
+    const existingIndexes = (
+        db
+            .query(
+                `SELECT name FROM sqlite_master WHERE type='index' AND tbl_name=? AND name NOT LIKE 'sqlite_%'`,
+            )
+            .all(table.tableName) as { name: string }[]
+    ).map((r) => r.name);
+
+    // Drop indexes not in schema
+    for (const indexName of existingIndexes) {
+        const stillExists = table.indexes.some(
+            (idx) => idx.indexName === indexName,
+        );
+        if (!stillExists) {
+            console.log(`Dropping index: ${indexName}`);
+            db.run(`DROP INDEX IF EXISTS ${q(indexName)}`);
+        }
+    }
+
+    // Create new indexes
+    for (const index of table.indexes) {
+        if (!index.indexName || !index.indexTableFields?.length) {
+            continue;
+        }
+
+        if (!existingIndexes.includes(index.indexName)) {
+            console.log(`Creating index: ${index.indexName}`);
+            const fields = index.indexTableFields
+                .map((f) => q(String(f)))
+                .join(", ");
+            db.run(
+                `CREATE INDEX ${q(index.indexName)} ON ${q(table.tableName)} (${fields})`,
+            );
+        }
+    }
+}