chore: add changelog fragment for PR #4

Author: vistart

changelog.d/4.added.md

@@ -0,0 +1 @@
+Adapt the SQL Server backend to derived DDL with typed options: `SQLServerColumnDefinition`, `SQLServerCreateTableOptions`, `SQLServerIndexDefinition` with typed hash-index fields, typed `ALTER COLUMN` options, a graph table expression, and typed `MERGE` / `SELECT INTO` / partition scheme. Add type DDL support, classify `CommentSupport` and `ColumnAttributeSupport` for conformance, and cover `DDLSource` collection, table inheritance, tablespace and inline-index rendering.

changelog.d/4.fixed.md

@@ -0,0 +1 @@
+Stop silently discarding declared DDL in the SQL Server backend: a declared table or column comment now raises instead of being dropped, declared DDL options are no longer discarded, unsupported table declarations are rejected rather than omitted, and `CREATE VIEW ... WITH CHECK OPTION` is gated on `supports_view_check_option`.

changelog.d/4.internal.md

@@ -0,0 +1 @@
+Install core and testsuite from release branches in CI instead of the derived-DDL feature branch, repair TYPE_CHECKING imports broken by the expression namespace split, register the pytest markers the suite already uses, and stop the pre-commit hook from blocking commits on revisions that predate `scripts/preflight.sh`.

changelog.d/4.removed.md

@@ -0,0 +1 @@
+Remove the reserved `dialect_options` bag from data-type value objects and partition clauses, the legacy identity fields on column classes, the Firebird clause parameters inherited by the SQL Server create-table subclass, and the dead `format_cte` method.