Function submit_review 

pub async fn submit_review(
    base_url: &str,
    owner: &str,
    repo: &str,
    pr_number: u64,
    state: ReviewState,
    message: &str,
    token: &str,
) -> Result<(), RsGuardError>

Submits a review to a GitHub Pull Request with automatic permission fallback.

If the initial review state (e.g. APPROVE or REQUEST_CHANGES) fails due to insufficient permissions (HTTP 403), the function retries with COMMENT and prepends [Bot fallback from {state}] to the message.

The base_url is validated against an allowlist before any request is made.

Arguments

• base_url — GitHub API base URL (e.g. "https://api.github.com").
• owner — Repository owner.
• repo — Repository name.
• pr_number — Pull request number.
• state — Desired review state.
• message — Review body text.
• token — GitHub authentication token.