Add json-columns module: JSON columns in Hibernate 7.4.14 (@JdbcTypeCode(SqlTypes.JSON)), JSONB querying, GIN/expression indexes, dirty checking, Jackson 3 vs 2 on PostgreSQL 18.6 and MySQL 8.0.46

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b6Kg9RWSTJzyz6KP9X

json-columns/scripts/run-all.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Regenerates every file under output/. Needs JDK 25, Maven 3.9 with access to Maven Central, and the two database servers
+# from scripts/start-databases.sh (PostgreSQL on 55432, MySQL on 53306; override with PG_URL / MYSQL_URL).
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+mvn -B -q clean >/dev/null
+./scripts/versions.sh >/dev/null
+./scripts/maven-facts.sh >/dev/null                             # release dates read from Maven Central
+./scripts/javap.sh >/dev/null                                 # deepCopy / areEqual bytecode behind the dirty-checking results
+mvn -B test                                                   # A01-A09, A11: default classpath (Jackson 3 only)
+mvn -B test -Phypersistence -Dtest='A10*'                     # hypersistence-utils on a Jackson 3 only classpath
+mvn -B test -Phypersistence,jackson2 -Dtest='A10*'            # ... and with Jackson 2 added
+./scripts/format-mapper-matrix.sh >/dev/null                  # nine classpath variants of the FormatMapper probe
+ls -1 output