CREATE INDEX idx_contents_user_id ON contents(user_id);
CREATE INDEX idx_contents_status_created ON contents(status, created_at);
CREATE INDEX idx_contents_deleted_at ON contents(deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX idx_content_files_content_id ON content_files(content_id);
CREATE INDEX idx_content_files_hash ON content_files(encrypted_hash);
CREATE INDEX idx_reports_content_id ON reports(content_id);
CREATE INDEX idx_reports_status ON reports(status);