chore: add changeset for STE Vec query support

Author: tobyhede

.changeset/ste-vec-query-support.md

@@ -0,0 +1,11 @@
+---
+"@cipherstash/protect": minor
+"@cipherstash/schema": minor
+---
+
+Add STE Vec query support to encryptQuery API for encrypted JSONB columns.
+
+- New `searchableJson()` method on column schema enables encrypted JSONB queries
+- Automatic query operation inference from plaintext shape (string → steVecSelector, object/array → steVecTerm)
+- Supports explicit `queryType: 'steVecSelector'` and `queryType: 'steVecTerm'` options
+- JSONB path utilities for building encrypted JSON column queries