DBIO-DB2-0.900001

Changes for version 0.900001 - 2026-07-12

Diff
- Fix DROP INDEX / DROP TABLE collision in full-schema sync (karr #19). When diff reconciled a live schema containing a table absent from the target (removed from the app's DBIO classes, or an unmanaged leftover), it emitted both DROP TABLE <t> and a later standalone DROP INDEX for one of that table's indexes; since DB2's DROP TABLE already removes the table's own indexes, the standalone DROP INDEX failed (index no longer exists) and aborted apply()/upgrade(). DBIO::DB2::Diff::Index now receives the tables sections (threaded in by DBIO::DB2::Diff) and suppresses a standalone DROP INDEX for any index whose owning table is itself being dropped in the same pass. Indexes of surviving tables are still dropped as before. Backward compatible: absent table sections yield an empty dropped set (original two-argument behaviour).
- Add t/32-diff-drop-table-index.t and extend t/30-diff.t: full-diff regression for the collision (karr #19) plus Diff::Index unit cases for the tables-aware drop suppression, including an over-suppression guard (a surviving table's index is still dropped standalone).
Project
- Added SECURITY.md following CPAN Security Group author guidelines (v1.5.0): private email-first reporting with CPANSec escalation
Dependencies
- DBD::DB2 is now a hard requires (was recommends); a database-specific DBIO driver is useless without its DBD
- Requires core DBIO >= 0.900001 (family-wide version alignment)