v0.2.1

Release notes — mysql-aiops 0.2.1

Previous release: 0.2.0.

Fixed: server databases crashed against a real server

SUM() aggregates come back from MySQL as decimal.Decimal, which json cannot
encode — so server databases raised
TypeError: Object of type Decimal is not JSON serializable on every live server.
The mock suite could not see this: its fixtures returned plain ints.

Numeric aggregates now go through a shared as_int() helper, and the regression test
models the driver's real types. Absent stays None rather than becoming 0 — an
unknown count and a zero count are different facts.

Live-verified

This release was exercised end-to-end against a real MySQL 8.4.10 server: reads
cross-checked against the mysql client, analyze slow-query on genuine full scans,
the full governance loop (real create_index → audit row → undo_apply actually
dropping it), and both layers of read-only mode. See
docs/VERIFICATION.md for what is confirmed and what is still
open — MariaDB remains mock-only and is now the largest gap in this repo.