feat(server): load bases into DuckDB and serve list queries from cache

- collection-loader streams base rows via postgres and bulk-inserts into an
  in-memory DuckDB instance using the Appender API, then builds an index on
  each indexable column
- base-query-cache service routes list() calls through the prepared-statement
  path; ensureLoaded does schema-version checks with single-pass LRU eviction
- keyset param-ordering bug in the DuckDB builder fixed: placeholders appear
  head-to-tail but were being pushed tail-to-head, which made DuckDB bind the
  wrong value for each ? and throw Binder Error on typed columns
- base-row repo gains countActiveRows for the router to use in task 6
- seed script split into an importable helper so integration tests can seed a
  10k-row base deterministically without shelling out
- new integration spec compares Postgres vs DuckDB pagination end-to-end for
  a numeric sort and guards against duplicate rows from DuckDB

Integration test is skipped unless INTEGRATION_DB_URL is set.

apps/server/src/database/repos/base/base-row.repo.ts

@@ -128,6 +128,21 @@ export class BaseRowRepo {
     });
   }
 
+  async countActiveRows(
+    baseId: string,
+    opts: WorkspaceOpts,
+  ): Promise<number> {
+    const db = dbOrTx(this.db, opts.trx);
+    const row = await db
+      .selectFrom('baseRows')
+      .select((eb) => eb.fn.countAll<number>().as('count'))
+      .where('baseId', '=', baseId)
+      .where('workspaceId', '=', opts.workspaceId)
+      .where('deletedAt', 'is', null)
+      .executeTakeFirst();
+    return Number(row?.count ?? 0);
+  }
+
   async getLastPosition(
     baseId: string,
     opts: WorkspaceOpts,