Add BugHunter clean solve replay variants

src/main/resources/db/migration/V13__bughunter_progress.sql

@@ -0,0 +1,11 @@
+CREATE TABLE bughunter_hunt_progress (
+    id BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+    username VARCHAR(100) NOT NULL,
+    hunt_slug VARCHAR(150) NOT NULL,
+    solved_clean BOOLEAN NOT NULL DEFAULT FALSE,
+    variant_index INT NOT NULL DEFAULT 0,
+    solved_at TIMESTAMP,
+    CONSTRAINT uq_bughunter_progress_user_hunt UNIQUE (username, hunt_slug)
+);
+
+CREATE INDEX idx_bughunter_progress_user ON bughunter_hunt_progress(username);