Release v0.20: регистрация, авторизация, личный кабинет

Co-authored-by: Cursor <cursoragent@cursor.com>

postgres/init/02_users.sql

@@ -0,0 +1,17 @@
+CREATE TABLE IF NOT EXISTS users (
+    id            SERIAL PRIMARY KEY,
+    email         VARCHAR(255) NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    name          VARCHAR(120) NOT NULL,
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS sessions (
+    id         VARCHAR(64) PRIMARY KEY,
+    user_id    INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    expires_at TIMESTAMPTZ NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_sessions_user_id ON sessions (user_id);
+CREATE INDEX IF NOT EXISTS idx_sessions_expires_at ON sessions (expires_at);