[OpenDeernet]

Fixes #35

/status/99 and /status/1000 used to come back as 200 OK because StatusCode::from_u16 fails and the handlers fall back to StatusCode::OK. This adds a range check in parse_weighted_codes, so these codes now get the same 400 {"error": "Invalid status code"} already used for unparsable codes (matching httpbin). It covers both the GET and POST handlers and comma-separated lists too.

Added a test for 99, 1000, 0 and 200,1000 on GET and POST. cargo test, cargo fmt --check and cargo clippy all pass locally.

Thanks for taking a look!

[s3anw3]

Thanks for the fix! Validating codes in the shared parser correctly rejects out-of-range values before selection and covers both GET and POST, including comma-separated lists. The added regression test covers the reported cases. Local validation passed: 275 library tests, including one additional review-only test. No blocking findings.