fix: ordered_param_types and add unit test

[cemremengu]

ordered_param_types() received inferred parameter types from DataFusion as a HashMap keyed by strings such as $1, $2, ..., $10. Because HashMaps are unordered, the code sorted the keys before building the positional parameter type list returned to the client.

However, the keys were sorted lexicographically:

$1, $10, $2, $3, ...

instead of numerically:

$1, $2, $3, ..., $10

For queries with more than nine placeholders, this caused parameter types to be assigned to the wrong positions. For example, the type inferred for $10 could be reported or used as if it belonged to $2. As a result, clients could bind or deserialize values using incorrect PostgreSQL types, such as treating a UUID parameter as a timestamp.

The fix was to sort parameters by their numeric suffix:

types.sort_by_key(|(key, _)| {
    key.trim_start_matches('$')
        .parse::<u32>()
        .unwrap_or(u32::MAX)
});