✨ Support EXECUTE statements - with permissions

[joocer]

EXECUTE <function>[(<param>[, param,...])]

Tactical solution - Save the SQL for the query in a local file, use the existing parameterization functionality to insert parameters.

Need to find a way to limit some users to only EXECUTE functions - i.e. cannot run arbitrary SQL, can only run prepared statements.

[joocer]

something like

opteryx.connection(permissions=opteryx.permissions)

RBACed applications can then do something like

roles_permissions = {
    "admin": opteryx.permissions,
    "user": {"Execute"}
}

permissions = set()
for role in user_roles:
    if role in roles_permissions:
        permissions |= roles_permissions[role]
return permissions