JDBC prepared statements aren't closed

[DelusionalLogic]

Describe the bug
When persisting a bunch of objects, DB2 JCC runs out of prepared statement objects. Running with DB2 tracing enabled reveals that eclipselink isn't closing the statements it's preparing.

5.0.0-B06 produces the following trace.

[jcc][Connection@f7ec65] DB2 LUWID: 172.17.0.1.40032.250217114216.0536
[jcc][Time:2025-02-17-12:41:39.430][Thread:com.example.App.main()][Connection@f7ec65]commit () returned null
[jcc][Time:2025-02-17-12:41:39.430][Thread:com.example.App.main()][Connection@f7ec65]setAutoCommit (true) called
[jcc][Time:2025-02-17-12:41:39.430][Thread:com.example.App.main()][Connection@f7ec65]setAutoCommit (false) called
[jcc][Time:2025-02-17-12:41:39.430][Thread:com.example.App.main()][Connection@f7ec65]prepareStatement (INSERT INTO Entity (VALUE) VALUES (?), 1) called
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][Connection@f7ec65]prepareStatement () returned com.ibm.db2.jcc.am.bq@26923e7c
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]setLong (1, 1337) called
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]executeUpdate () called
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]stmt_bidiTransform (select ID from final table (INSERT INTO Entity (VALUE) VALUES (?))) called
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]stmt_bidiTransform not enabled (select ID from final table (INSERT INTO Entity (VALUE) VALUES (?))) called
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]executeUpdate () returned 1
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]getGeneratedKeys () called
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][PreparedStatement@26923e7c]getGeneratedKeys () returned ResultSet@19eae7f8
[jcc][Time:2025-02-17-12:41:39.431][Thread:com.example.App.main()][Connection@f7ec65]commit () called
[jcc][Connection@f7ec65] DB2 LUWID: 172.17.0.1.40032.250217114216.0537

Where 3.0.4 (the last version I could find that worked) did close the statements.

jcc][Connection@599479c6] DB2 LUWID: 172.17.0.1.36346.250217114256.0641
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][Connection@599479c6]commit () returned null
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][Connection@599479c6]setAutoCommit (true) called
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][Connection@599479c6]setAutoCommit (false) called
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][Connection@599479c6]prepareStatement (INSERT INTO Entity (VALUE) VALUES (?)) called
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][Connection@599479c6]prepareStatement () returned com.ibm.db2.jcc.am.bq@548515e1
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][PreparedStatement@548515e1]setLong (1, 1337) called
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][PreparedStatement@548515e1]executeUpdate () called
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][PreparedStatement@548515e1]stmt_bidiTransform (INSERT INTO Entity (VALUE) VALUES (?)) called
[jcc][Time:2025-02-17-12:42:26.153][Thread:com.example.App.main()][PreparedStatement@548515e1]stmt_bidiTransform not enabled (INSERT INTO Entity (VALUE) VALUES (?)) called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@548515e1]executeUpdate () returned 1
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@548515e1]close () called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][Connection@599479c6]prepareStatement (SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1) called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][Connection@599479c6]prepareStatement () returned com.ibm.db2.jcc.am.bq@7c7db9b7
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@7c7db9b7]executeQuery () called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@7c7db9b7]stmt_bidiTransform (SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1) called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@7c7db9b7]stmt_bidiTransform not enabled (SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1) called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@7c7db9b7]executeQuery () returned com.ibm.db2.jcc.t4.h@5e8b4810
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][PreparedStatement@7c7db9b7]close () called
[jcc][Time:2025-02-17-12:42:26.154][Thread:com.example.App.main()][Connection@599479c6]commit () called
[jcc][Connection@599479c6] DB2 LUWID: 172.17.0.1.36346.250217114256.0642

To Reproduce
I've made a reproduction project available. You'll need to bring your own database and db2jcc driver. I've made use of an internal mirror.