[DangTAnh]

sqlparse tokenizes CREATE OR REPLACE ... as a single keyword token, so the existing CREATE blacklist entry never matches and these statements pass passes_blacklist.

Fixes #704

Changes:

• explorer/app_settings.py: add "CREATE OR REPLACE" to default EXPLORER_SQL_BLACKLIST
• docs/settings.rst: mirror the default in docs
• explorer/tests/test_utils.py: regression test test_ddl_create_or_replace

Testing: manage.py test explorer.tests.test_utils -- 43 tests OK; new test fails without the fix and passes with it.

[DangTAnh]

Heads-up: the red docs check on this branch is unrelated to the change. ubuntu-latest moved to Ubuntu 26.04, where actions/setup-python has no Python 3.9 build, so the job dies in Set up Python (it also fails on the dependabot/npm_and_yarn/multi branch). Opened #730 (pin the docs job to ubuntu-24.04) which makes that job pass again; this PR can be refreshed against master once it lands.