security: bump aiomysql to 0.3.2 to resolve CVE-2025-62611

[kenwoodjw]

Summary

security: bump aiomysql to 0.3.2 to resolve CVE-2025-62611

Solution Description

• Update pyproject.toml:13 to require aiomysql ^0.3.2, addressing CVE-2025-62611.
• Run poetry update aiomysql so poetry.lock and the environment resolve to aiomysql 0.3.2 (poetry show aiomysql confirms).
• Verification: with OceanBase running and an empty-password jtuser@test user created, poetry run pytest passes except for tests/test_json_table.py::ObVecJsonTableTest::test_user_group, which still
  fails because the multi-user scenario can’t find table table_shared.

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[whhe]

LGTM