✨ Enhancement

This change removes two duplication hotspots in guards/github-guard/rust-guard/src/labels/backend.rs without altering behavior: repeated item-scan logic in owner-type extraction and repeated full_name/fullName lookup logic in repo ID extraction. The result is a smaller, more maintainable parsing path with unchanged field precedence and fallback behavior.

What does this improve?

• Owner-type lookup deduplication
  • Introduces find_org_in_items(items, repo_id) and reuses it for both response shapes:
    • { "items": [...] }
    • plain array [...]
• Repo ID field lookup deduplication
  • Replaces duplicate if blocks for "full_name" and "fullName" with a single ordered loop.
• Regression coverage for refactor paths
  • Adds focused tests for:
    • plain-array owner/org extraction path
    • camelCase fullName repo ID extraction path

Why is this valuable?

• Reduces copy/paste control flow in high-traffic parsing helpers.
• Centralizes repo-ID match logic used by owner-type extraction.
• Makes future alias additions and edge-case coverage lower-risk.

Implementation approach:

• Extracted shared iterator-based helper:

fn find_org_in_items(items: &[Value], repo_id: &str) -> Option<bool> {
    items.iter().find_map(|item| {
        let item_repo_id = repo_id_from_repo_object(item)?;
        if item_repo_id.eq_ignore_ascii_case(repo_id) {
            owner_type_from_repo_object(item)
        } else {
            None
        }
    })
}

• Updated owner_is_org_from_items to delegate both array shapes to the helper.
• Updated repo_id_from_repo_object to iterate ["full_name", "fullName"] in priority order, preserving existing behavior.