v0.2.0 — Priority 1 features

What is new

Priority 1 features for JDBORM

• Raw SQL execution — db.execute(sql, params), db.query(sql, mapper, params), db.querySingle(sql, type, params)
• setRaw() — SQL expressions in INSERT/UPDATE (e.g. setRaw(created_at, NOW()))
• ON CONFLICT — onConflictDoNothing(), onConflictDoUpdate(clauses...) on InsertQuery
• Custom RowMapper — SelectQuery.execute(RowMapper<T>) without reflection overhead
• executeScalar() — single-value results (e.g. SELECT count(*))
• Batch INSERT — addBatch() / executeBatch() for multi-row inserts
• Transaction API — db.inTransaction(tx -> { ... }) with auto commit/rollback
• Full Javadoc on every public class, method, and field

See AGENTS.md for the complete API reference.