feat: add storage and media table

backend/database/migrations/20250110093636_create_medias.sql

@@ -0,0 +1,23 @@
+-- +goose Up
+-- +goose StatementBegin
+-- create medias table
+CREATE TABLE medias (
+    id SERIAL8 PRIMARY KEY,
+    created_at timestamp NOT NULL default now(),
+    updated_at timestamp NOT NULL default now(),
+
+    user_id INT8 NOT NULL,
+    post_id INT8 NOT NULL,
+    storage_id INT8 NOT NULL,
+    name VARCHAR(255) NOT NULL default '',
+    uuid VARCHAR(128) NOT NULL,
+    mime_type VARCHAR(128) NOT NULL default '',
+    size INT8 NOT NULL default 0,
+    path VARCHAR(255) NOT NULL default ''
+);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE medias;
+-- +goose StatementEnd