fix: resolve build errors and improve database migration system

- Remove unused SQLite migration script 1.8.1.ts that was causing
  TypeScript compilation errors during PostgreSQL builds
- Fix verifyTotp.ts type error by adding proper null check for password
  parameter before passing to verifyPassword function
- Fix SQLite migration script 1.7.0.ts syntax errors in transaction
  structure and error handling
**- Update SQLite migration system to not drop tables by default, as this was used during testing and should not be in production.**

Fixes build failures for both "make build" (SQLite) and "make build-pg"
(PostgreSQL) Docker image builds.

server/db/sqlite/migrate.ts

@@ -1,46 +1,13 @@
 import { migrate } from "drizzle-orm/better-sqlite3/migrator";
 import db from "./driver";
 import path from "path";
-import { location } from "./driver";
-import Database from "better-sqlite3";
-import type { Database as BetterSqlite3Database } from "better-sqlite3";
 
 const migrationsFolder = path.join("server/migrations");
 
-const dropAllTables = (sqlite: BetterSqlite3Database) => {
-    console.log("Dropping all existing tables...");
-    
-    // Disable foreign key checks
-    sqlite.pragma('foreign_keys = OFF');
-    
-    // Get all tables
-    const tables = sqlite.prepare(`
-        SELECT name FROM sqlite_master 
-        WHERE type='table' 
-        AND name NOT LIKE 'sqlite_%'
-    `).all() as { name: string }[];
-    
-    // Drop each table
-    for (const table of tables) {
-        console.log(`Dropping table: ${table.name}`);
-        sqlite.prepare(`DROP TABLE IF EXISTS "${table.name}"`).run();
-    }
-    
-    // Re-enable foreign key checks
-    sqlite.pragma('foreign_keys = ON');
-};
-
 const runMigrations = async () => {
     console.log("Running migrations...");
     try {
-        // Initialize the database file with a valid SQLite header
-        const sqlite = new Database(location) as BetterSqlite3Database;
-        
-        // Drop all existing tables first
-        dropAllTables(sqlite);
-        
-        // Run the migrations
-        migrate(db as any, {
+        await migrate(db as any, {
             migrationsFolder: migrationsFolder,
         });
         console.log("Migrations completed successfully.");