feat(bootstrap): config, factory wiring, main entry point

migrations_sqlite/20240101000000_init_users.sql

@@ -1,11 +1,10 @@
 -- Create users table
 CREATE TABLE IF NOT EXISTS users (
     id TEXT PRIMARY KEY NOT NULL,
-    subject TEXT NOT NULL,
     email TEXT NOT NULL,
-    password_hash TEXT,
+    password_hash TEXT NOT NULL,
+    role TEXT NOT NULL DEFAULT 'user',
     created_at TEXT NOT NULL
 );
 
-CREATE UNIQUE INDEX IF NOT EXISTS idx_users_subject ON users(subject);
 CREATE UNIQUE INDEX IF NOT EXISTS idx_users_email ON users(email);