Keep artifact list and beta queries free of file bytes

src/lib/server/db/version-layout.ts

@@ -0,0 +1,27 @@
+import type Database from 'better-sqlite3';
+
+/** Keep metadata ahead of overflow pages, preserving IDs and all references. */
+export function migrateVersionLayout(handle: Database.Database): void {
+    const columns = handle.pragma('table_info(script_versions)') as { name: string }[];
+    if (columns.at(-1)?.name === 'content') return;
+    const { sql } = handle.prepare("SELECT sql FROM sqlite_master WHERE name='script_versions'").get() as { sql: string };
+    const content = /\bcontent\s+BLOB\s+NOT\s+NULL\s*,/i;
+    if (!content.test(sql)) throw new Error('Unrecognized script version content layout');
+    const replacement = sql.replace(content, '').replace(/,\s*UNIQUE\s*\(/i, ', content BLOB NOT NULL, UNIQUE(')
+        .replace('script_versions', 'script_versions_metadata');
+    const dependents = handle.prepare("SELECT sql FROM sqlite_master WHERE tbl_name='script_versions' AND type IN ('index','trigger') AND sql IS NOT NULL")
+        .all() as { sql: string }[];
+    const sequence = handle.prepare("SELECT seq FROM sqlite_sequence WHERE name='script_versions'").get() as { seq: number } | undefined;
+    handle.pragma('foreign_keys = OFF');
+    try {
+        handle.transaction(() => {
+            handle.exec(replacement);
+            const names = columns.map(column => `"${column.name}"`).join(',');
+            handle.exec(`INSERT INTO script_versions_metadata (${names}) SELECT ${names} FROM script_versions;
+                DROP TABLE script_versions; ALTER TABLE script_versions_metadata RENAME TO script_versions;`);
+            if (sequence) handle.prepare("UPDATE sqlite_sequence SET seq=MAX(seq,?) WHERE name='script_versions'").run(sequence.seq);
+            for (const dependent of dependents) handle.exec(dependent.sql);
+            if ((handle.pragma('foreign_key_check') as unknown[]).length) throw new Error('Version layout migration found broken references');
+        })();
+    } finally { handle.pragma('foreign_keys = ON'); }
+}