Function bin_param_locations 

pub fn bin_param_locations(
    query: &AnalyzedQuery,
    http: &HttpAnnotations,
) -> BTreeMap<String, HttpParamBinding>

Decide where each AnalyzedParam is sourced from, falling back from explicit @http_param overrides to inference rules:

1. explicit binding wins,
2. name appears as {name} in path → path,
3. GET/DELETE → query,
4. POST/PUT/PATCH → body.