CREATE TABLE IF NOT EXISTS extensions (    id SERIAL PRIMARY KEY,    name TEXT NOT NULL,    external_id TEXT NOT NULL,    latest_version TEXT NOT NULL,    total_download_count BIGINT NOT NULL DEFAULT 0); CREATE TABLE IF NOT EXISTS extension_versions (    extension_id INTEGER REFERENCES extensions(id),    version TEXT NOT NULL,    published_at TIMESTAMP NOT NULL DEFAULT now(),    authors TEXT NOT NULL,    repository TEXT NOT NULL,    description TEXT NOT NULL,    download_count BIGINT NOT NULL DEFAULT 0,    PRIMARY KEY(extension_id, version)); CREATE UNIQUE INDEX "index_extensions_external_id" ON "extensions" ("external_id");CREATE INDEX "trigram_index_extensions_name" ON "extensions" USING GIN(name gin_trgm_ops);CREATE INDEX "index_extensions_total_download_count" ON "extensions" ("total_download_count");