add middlewares, handlers and database models

internal/db/migrations/00003_create_profiles_table.sql

@@ -0,0 +1,19 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS profiles (
+    id TEXT PRIMARY KEY,
+    user_id TEXT UNIQUE NOT NULL,
+    name TEXT NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+
+CREATE INDEX IF NOT EXISTS idx_profiles_user_id ON profiles(user_id);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP INDEX IF EXISTS idx_profiles_user_id;
+DROP TABLE IF EXISTS profiles;
+-- +goose StatementEnd