change db from sqlite3 to postgresql

assets/migrations/20250103140557_response_cache.sql

@@ -1,13 +0,0 @@
--- +goose Up
--- +goose StatementBegin
-CREATE TABLE responses (
-    url             VARCHAR(255) NOT NULL UNIQUE PRIMARY KEY,
-    content         TEXT NOT NULL,
-    fetchDate       DATETIME DEFAULT CURRENT_TIMESTAMP
-);
--- +goose StatementEnd
-
--- +goose Down
--- +goose StatementBegin
-DROP TABLE responses;
--- +goose StatementEnd