feat: self-request as reviewer before posting

Closes #35

Before posting a review, the bot:
1. Discovers its own Gitea login via GET /user
2. Calls POST /requested_reviewers to add itself

This ensures the bot appears in the required-reviewers list without
manual configuration on the repo. The call is idempotent (no-op if
already requested).

Both failures are non-fatal (warn + continue) — the review still posts
even if the self-request fails.

cmd/review-bot/main.go

@@ -344,6 +344,18 @@ func main() {
 		}
 	}
 
+	// Self-request as reviewer (ensures we appear in required-reviewer checks)
+	authUser, err := giteaClient.GetAuthenticatedUser(ctx)
+	if err != nil {
+		slog.Warn("could not determine authenticated user for reviewer self-request", "error", err)
+	} else if authUser != "" {
+		if err := giteaClient.RequestReviewer(ctx, owner, repoName, prNumber, authUser); err != nil {
+			slog.Warn("could not self-request as reviewer", "user", authUser, "error", err)
+		} else {
+			slog.Debug("self-requested as reviewer", "user", authUser, "pr", prNumber)
+		}
+	}
+
 	// POST new review
 	slog.Info("posting review", "event", event, "pr", prNumber)
 	posted, err := giteaClient.PostReview(ctx, owner, repoName, prNumber, event, reviewBody, inlineComments)